Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad1c01199133d70…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 16:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 6494581653f5dd048671baa3cae6ad1c SHA-1: cac1c3316a8a9461aff652d1b05e52b019ec9d21 SHA-256: 3ad1c01199133d7091cccee36078e85833f824eb91aeb2065ca90327ebc64295
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://sitarofindiamd.com/userfiles/file/zimewakuxirukarekegu.pdf In PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/81437380546.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/78416365427.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/22325528405.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/revokifobemuve.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/sowupojudujekabaz.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/51857878591.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/42399612913.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jabexis.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/96503258110.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/xifanelunaj.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/luzogamuzaduxusabezalet.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/37379407935.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/82503208121.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/lodumifa.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/54637780438.pdfIn PDF document text
    • http://kotolantopeni.cz/file/xidiwerekimav.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/motibigofelijuzujeguxun.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/33263190192.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/96270143009.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/78974684716.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/kazuvutigexatoba.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/33043113009.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/lirituzewapovaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=kvs+tgt+syllabus+science+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD145 19508 bytes
SHA-256: f2817d7660d1ebe956a9af7d09e1377a5654d40e7d0d7b17cc713e665cafb4f5
font_01_sfnt_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4A 10984 bytes
SHA-256: d97eeeb5d91493e437fdb899768f8c942dfab2fabea6869e12f9bbf251870348

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