Malicious PDF — malware analysis report

Static analysis result for SHA-256 7927546c8a864868…

MALICIOUS

PDF

82.1 KB Created: 2021-09-13 12:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 262469776260c29658f28c08a93bf73c SHA-1: bf9000d1fa10d37874c6056b9364698da8bf91ee SHA-256: 7927546c8a8648689cdeef18ee991f070e4358189876e162707cab875b1a0276
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as an advance-fee scam, using lottery or prize language combined with parcel delivery requirements to deceive the user. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack vector, likely intended to lead the user to a malicious site or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ozkayalartrans.com/userfiles/file/20962283389.pdf
    • http://moiarchitekci.pl/pliki/file/juwakil.pdf
    • http://savages.lu/imagesRTE/files/jakosoradesiniwowipubu.pdf
    • http://vietnam-intraco.com/webroot/img/files/dotefaterejif.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/55386112191.pdf
    • http://kronospan-mofa.hu/editor_up/24870859833.pdf
    • http://karpatskiles.ru/store/file/posaloletirodede.pdf
    • http://tivatijapan.com/uploads/userfiles/file/gewizivubonariz.pdf
    • https://kisikana.hr/UserFiles/files/kabixolegifavagemeze.pdf
    • http://abwhopewell.com/uploads/files/nitunabufiwudesejirudul.pdf
    • http://starcity-vinhomes.vn/app/webroot/img/files/25975115927.pdf
    • http://dycelife.com/userfiles/file/pexigaraxozukovurepe.pdf
    • http://mbjarrahi.com/UploadedFiles/New/file/tejiwesur.pdf
    • http://kerrya.com/ckfinder/userfiles/files/sanuguz.pdf
    • http://kursadowicz.pl/Upload/file/jewezisibunu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=floyd+mayweather+vs+logan+paul+watch+online
    • 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_off0000d79a.bin
c39ca837279ab677b23f6d1a97cc566758ed4ff256efa78bb00f66196e22f9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD79A 19092 bytes
font_01_sfnt_off0001094c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 16792 bytes
font_02_sfnt_off00012163.bin
467ae8796740b3cb9531d34724312a6d804e36e9effbdb5714e4ac129965bfa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12163 11304 bytes

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