Malicious PDF — malware analysis report

Static analysis result for SHA-256 5769f1f6d27999ea…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 00:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 8c7696bfad4ada9738cc473723a8de60 SHA-1: 026ba848e78397685f19686e1a70ddc2518651b7 SHA-256: 5769f1f6d27999eab1f60ff3ece7123f314fd92918c6ecc03cb07f4fe65b3b39
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The presence of 'utm_term' parameters suggests tracking or redirection, common in phishing campaigns. No scripts were extracted, but the overall structure points to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/uplcv?utm_term=padmavati+full+movie+watch+online+hd PDF link annotation
    • http://innotack.com/userfiles/files/jirujot.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/2698906935.pdfIn PDF document text
    • http://generoussecurity.com/uploads/fadezijevuwetugin.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/35949122119.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0b69dc18e5240f6a84fb413f5e5ab81b/57698826066.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/gewivekap.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/vulozonudezowoxesokukukuv.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/xudusavubo.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/46184984184.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/82430479480.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/xibijafefukekukurazu.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210909_E8949F6D2DCEBA0A.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/nakejonafizoxi.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/13885417605.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/76466428724.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6cc76dec2af41164b1c9341c5849a9d6/misopezivinafabod.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/98523286902.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/17378576504.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/nomikotevitabunupol.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/31115354711.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/vabumamupugilegig.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/bupoxamevabepigesaled.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_off0000d3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EE 10728 bytes
SHA-256: f436bff224ed68f6b38a3a6185505bda7afa981dd65a8230c862cd9e951c3d17
font_01_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 18004 bytes
SHA-256: 3b20ba8068a79d110a03cd40f7e9b34e63e1da6a8d96228a9eb7ef941216bfb3
font_02_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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