Malicious PDF — malware analysis report

Static analysis result for SHA-256 963bc14ef0ab3598…

MALICIOUS

PDF

74.1 KB Created: 2021-09-21 23:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6ea9eed6d0dd8d6f169a6b8a9307cac5 SHA-1: b443ffcd4c410fc29e52fbe4acc67bfe9eb89534 SHA-256: 963bc14ef0ab35981fc438431681d634bbd99d45af0a7227a003bc2a35ab2353
126 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains, which is a common tactic for phishing and scam operations. The presence of numerous unknown URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wmsone.com/eimages/file/17547587505.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147d9ae1cebd---feraresalemezimadimu.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/gusizinadogikijanokokem.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/mitijisi.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/wotumogexororisesonumu.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/92252854054.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/kubuvewulikig.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/tolulu.pdfIn PDF document text
    • http://vhshf.de/File/44830549200.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/55238282844.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/96082898747.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/18899432518.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/61969135558.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/guduridakanimamizaketed.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/63889773910.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/2194519956.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/desali.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/78311582177.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161424646af3ab---vevebanigeso.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/2164433011.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/34681158487.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/46949252731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=hd+tamil+live+tv+android+appPDF 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_off0000c185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC185 10440 bytes
SHA-256: 9cadcec5b5a21b5ef75ed9223d88f43af927117526accb792b33b235211d52f2
font_01_sfnt_off0000d90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 16308 bytes
SHA-256: 3c665ed5a5af211b6af73b4613d9ef94587badd08f69be387723433bcf700f95

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