Malicious PDF — malware analysis report

Static analysis result for SHA-256 124bd4633ea0948e…

MALICIOUS

PDF

89.6 KB Created: 2021-08-03 13:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 467d91c924e205744f59976eb02109ab SHA-1: 7a4d314450a9c2c19e571fe1676e9dbdce66c74d SHA-256: 124bd4633ea0948e6929fc99884cff1ae672bac19dec0045e4ae7fa8293e21b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely used to lure victims into phishing scams or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://wastran.ru/uplcv?utm_term=are+music+streaming+services+worth+it PDF link annotation
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160915ad12d77c---17322689253.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/35376099515.pdfIn PDF document text
    • http://luatsubienhoa.com/upload/ck/files/28156473696.pdfIn PDF document text
    • https://educhina.mn/editor/files/jarikafoxekoweti.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/40930344676.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e56bf8605eaa1cb51a86d937cd62e7fd/gaxawejojosuxolo.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b18d9371abdacfb0396f6a1499350bde/63929177436.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/64316105615.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c8666f4c3ac---44046414349.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/21481520025.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/gafoso.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/864ss07cfe9hm1v7npogsinudo/38424739794.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/5hpmgk32nlri10bdbibb7bli5c/fixala.pdfIn PDF document text
    • http://denprokhorov.ru/images/file/9271126528.pdfIn PDF document text
    • https://cecprint.com/images/file/perilenerinaxisogok.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/bivemixip.pdfIn PDF document text
    • http://qdjshg.com/files/file/pirijipi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/a0c5ae1191af27a29694d2bf9afeb619/60717735193.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8550a6266---mefabugazejajotev.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/6d46e63ac4b9b2367698107120b726f3/lavawumizukusisefunog.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/eo2pp4qdmu41evf0vcsa4ctns4/56137373731.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/59034582152.pdfIn PDF document text
    • http://dzbnf.com/upload/file///lupeduwun.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 17852 bytes
SHA-256: 1d83bc00cad27876b0b89a8de97d99b91752e34c0600461fb734ac6b7dcf1cca
font_01_sfnt_off00012653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6A 10864 bytes
SHA-256: 5f6d41fed2055a18ab7244dfa390c88adfba59d256a97819cf6d9333a4b46fe7

Open this report in the interactive analyzer, or submit your own file for analysis.