Malicious PDF — malware analysis report

Static analysis result for SHA-256 22210aa7e3528a14…

MALICIOUS

PDF

103.0 KB Created: 2021-08-28 12:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 38a821945d4e052ffc0a47fa8e154770 SHA-1: 5ac0af2185c888daa80735c2d19fd4585d92c44d SHA-256: 22210aa7e3528a144ab4266882b0ad38688a82ae5126b54da946d298be41f8d4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tasleemdubai.com/userfiles/files/82610544064.pdf In PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/35409498729.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/jufejolez.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/piveraxate.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-7-21/20210721010337407820.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/vebalufu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a67daa0fc53fa51262fc15452e087ba9/55588038708.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/simitilakewefebonuwid.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/92565344891.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/gositatuvenuginofutatanu.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/telem.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/nexuvekox.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/falujatilojuxunoxofaxujuw.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7b6d9891---xanavelaridozetaw.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/sunamewadelanezezefiden.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021071303484846.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/ludefopoga.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/62806529477.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/65656512359.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/36883120191.pdfIn PDF document text
    • http://hotstamping.pl/files/file/jafagosomelijifame.pdfIn PDF document text
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/65630440823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+the+square+root+of+2601PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14100 10864 bytes
SHA-256: 264d2a74629c93dba3ae5c9ebeab6c3509967519e1916f41af04bf92f6fd12af
font_02_sfnt_off00015a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A63 20040 bytes
SHA-256: 300b6746338dd42a25e6049b09ed9be2fba25ee40580bfd6ce9ded5f35156bd6

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