Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a264aefa4627da6…

MALICIOUS

PDF

84.2 KB Created: 2021-09-11 09:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d3fdbd79c497415b6dd2ba618b94306 SHA-1: af842ddc197c969ae264e8c7adba046e642e635d SHA-256: 9a264aefa4627da6293004b49d79621a747b3a7be28442bc14ed9e99fe790d1f
166 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm on disposable hosting, with one specific URL pointing to a potential phishing lure. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is designed to trick users into believing they will receive a prize or parcel, requiring them to pay a fee, which is a common advance-fee fraud tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://philabc.ru/uplcv?utm_term=how+to+reboot+my+zte+android+phone
    • http://feriaalainversa.com/uploaded/files/jidabivefutebunakip.pdf
    • http://bsinteriordesigner.com/userfiles/files/benami.pdf
    • http://bogaarchitetti.it/userfiles/files/76023240958.pdf
    • http://pk.mo/userfiles/file/soziluxexilatutusifubovot.pdf
    • http://h-st.nl/bestanden/files/nixerotal.pdf
    • https://sanagustin.cl/files/33793785243.pdf
    • https://bodegoncriollo.com/userfiles/file/wewugiresizufemi.pdf
    • http://pzhjintai.com/upload/files/fezonenu.pdf
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/6876159499.pdf
    • http://rem-proekt.com/f/file/latebobanabavaf.pdf
    • http://ibookingkr.com/FileData/ckfinder/files/20210904_3B01162C732D5A45.pdf
    • http://sk-uralstroy.ru/uploads/files/pifabilolusibodujo.pdf
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/menujas.pdf
    • https://gmnavarra.es/ckeditor/files/dadidi.pdf
    • http://detikakdeti.ru/img/file/sivuwavin.pdf
    • http://agro-partner.com/Image/files/48016480651.pdf
    • https://posaonakosovu.com/ckfinder/userfiles/files/81472431840.pdf
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/52402375583.pdf
    • http://ashole.hu/UserFiles/File/76054691838.pdf
    • https://soi.icami.mx/ckfinder/userfiles/files/96534981295.pdf
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/91131968389.pdf
    • https://holycrosshealthcare.com/userfiles/files/64146598536.pdf
    • https://nocnepal.org.np/ckfinder/userfiles/files/pexibawawedum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e445.bin
c7d822703a319b6ac43fc0fb5c4d875de15d3f70231d0a65442195250601ce63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 17656 bytes
font_01_sfnt_off00011287.bin
5b9d85ce3555eee2a4a0120df50065f6a7dce4938f3080ea700e6e12e823c0cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11287 10836 bytes
font_02_sfnt_off00012b20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 16792 bytes

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