Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35c860ef25b018e…

MALICIOUS

PDF

85.0 KB Created: 2021-09-19 03:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d47d033055a7b70fdd3a74f888fd796b SHA-1: d395fa7b62bc3688ceab16abb9168d4e5b9acf2e SHA-256: d35c860ef25b018e48c48a682a4552849bbf21fa11e493e670f973001fcc134a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://smidgel.ru/uplcv?utm_term=how+to+delete+icon+on+android+phone
    • http://hbisan.com/userfiles/file/24208001702.pdf
    • http://actinq.nl/upload/file/lubutozudaga.pdf
    • http://oxigensupplies.com/shipinc/userfiles/files/92404303860.pdf
    • http://jenan.com/ckfinder/userfiles/files/50233778709.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613007f129f48---48839181885.pdf
    • http://seibyou-koujien.com/files/files/23815962510.pdf
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/33467891150.pdf
    • https://chuyennhakienvangvn.net/upload/files/13193426185.pdf
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/30525127890.pdf
    • https://salondumariagededijon.com/userfiles/file/42094925553.pdf
    • http://baohanhranghm.com/upload/img/files/89811370579.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/7a309f8e353ec56b8d172a8d360de4a7/57286747605.pdf
    • https://dolphinsolutions.net/ckfinder/userfiles/files/90415811187.pdf
    • https://lederstuhlshop.de/ckfinder/userfiles/files/lepifinerujajunimesa.pdf
    • https://nistd.in/userfiles/file/tubonezinusilalok.pdf
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/takawotusaleji.pdf
    • https://mywayrtk.com/userfiles/file/80804056792.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/97151192956.pdf
    • https://stephankeppel.com/userfiles/file/86288031426.pdf
    • http://tfh-filter.hu/_user/file/37715747006.pdf
    • http://thienanglass.vn/upload/files/kixanozojezowelopuzozip.pdf
    • https://okazionche.com/files/63334982724.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_off0000e7d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 16792 bytes
font_01_sfnt_off0000ffeb.bin
15c97255b56cd4c0190e4e48db050bb07c32ea1a07640d1b60a13a23f2387bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 17832 bytes
font_02_sfnt_off00012e76.bin
93d8d8f6c892f5bd56c2efa5d87a5425b3667b3f45a2e9acc2be6ad97a57d7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E76 10520 bytes

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