Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f0edfdd2d0add8…

MALICIOUS

PDF

107.3 KB Created: 2021-06-27 21:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e6edaf476899c2de75eea36f971f870d SHA-1: 6061613d97a6f2c582275defd699f9f61643a847 SHA-256: 96f0edfdd2d0add8c9a61781ca47e319351133cf1e8cd0f56cd21a54b94765e3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to trick users into downloading malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external links and the PDF structure are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/65be3cc3f9f13e1c6de6d800fec45850/72979055698.pdf In PDF document text
    • https://krassimirtaskov.com/userfiles/files/83207967127.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/2fd4c84af0c8a3bfebc2f96d13302023/litinanubisifezixenutali.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/mazax.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707dd46e9a6---60616738544.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c173097738d---72272341196.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/90ac3b70e5b778c5ea7d73cb49465335/nefoxojerutixe.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/jilugufobin.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ebbc6e0e3eb034f64eabe09b74bc5f1b/kobajubu.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a745fae30fa---30009731499.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8572dac903---19553957921.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5bc26cd6064d40530b99f188145e84d8/23037959648.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/af1d913211d2918560d8e975736a826a/simunazejoson.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aad271b2b73---88129477142.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/cc3286a6b32398a8d68cd375488d6a3c/81880673306.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/56909881920.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/28601788189.pdfIn PDF document text
    • http://puppiesjust4u.com/clients/c/c8/c8a8d0e690f73854b1e7a5fbb9521f82/File/3872341875.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/lezidiripebavu.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a86e423c47f---jijifujixovep.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a15c5b28cd---zusukiforudipobuwexegek.pdfIn PDF document text
    • http://dalaichau.com/files/pudivubalaruliximidogaba.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/41576731443.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4f2320fe091b126aff58f4c881fcb606/tezefezusoguf.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8be9ef0e403d45eddb1f2a571ea3eff6/xafowinoraramexi.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc836fd1d---fusaminovew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=translate+from+a+photo+iphonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001150e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1150E 22740 bytes
SHA-256: ea11c74511056a1047db7f84cdeadbc0adcd155208163e8a0c0083a429b062aa
font_00_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 10588 bytes
SHA-256: 5f02afce69237c10fdacdc8bc208ea7652fa45c2acfb20722ed2a3171123cb4a
font_02_sfnt_off00013d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D63 3960 bytes
SHA-256: 0ab642826e473ada37f7bcd6e3eb89684db795ba1c03714c74fce023f8857284
font_03_sfnt_off00014c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16415 24580 bytes
SHA-256: 439d602ed3526fed901ff0a71c9f5431c57ad31c6f1da3315c893e0e92ef3e78