Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbf329904208494…

MALICIOUS

PDF

80.7 KB Created: 2021-09-15 09:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49fd005c036447962947fc2b3eaf2540 SHA-1: 47b5d65406e0b7139cb4c467e7563b02efe4cfd1 SHA-256: 0fbf329904208494926cfb3b101c0bda87d6f8a56040d0301a2cf859dd32b05d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or are part of a link farm designed to obscure the ultimate destination. The presence of a visual download button further suggests a phishing or social engineering attempt to trick the user into downloading a malicious payload. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=iron+man+2+game+download+apk PDF link annotation
    • http://melvin.cz/data/fenijaxegabujekulanefo.pdfIn PDF document text
    • http://master-stroi76.ru/userfiles/file/56898417887.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/koromigik.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161411c2ae7acf---pesimupugoxebejaximusiwu.pdfIn PDF document text
    • http://banquat.com/userfiles/files/23785971196.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/rofusawazeg.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/33587241390.pdfIn PDF document text
    • http://www.phuongdonggolf.vn/app/webroot/uploads/files/77614722577.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631375195.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eed815f91f---3481489636.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/nadidefuverofuruja.pdfIn PDF document text
    • https://digireg.com/upload/bozalatoroxogagorusakukam.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/vifawutur.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090702181673499.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210903224916.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/84521502902.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1d44df6fd---603779939.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/95096184641.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/2d72debdc56d4188ed8e1ad99d098970/47123749351.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/zomeguzarebo.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/54005209320.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/fabuzifopizosexetif.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/13105209334.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_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 10628 bytes
SHA-256: 97bfd3ecf69e3054b17d01fc5f77720599c619c1841496685ec0980eddd68878
font_02_sfnt_off00010731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10731 17780 bytes
SHA-256: 50adaa05f47e6de39ce5c0f858872bd84690d1ce0fe6015bdd31f843de6926b4

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