Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f3879aa2014cae…

MALICIOUS

PDF

90.5 KB Created: 2021-06-01 15:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06361de974254dc6541a7b4146f762fd SHA-1: ced9ac6c65016811c43d27274a41c2c9e9317f83 SHA-256: 42f3879aa2014caede4c08485bda5998bba332b09f0730d67473bf243fc2516d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The embedded URL and the document body, though partially obfuscated, point towards a lure related to search terms, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=how+to+say+godchildren+in+spanish
    • https://static.s123-cdn-static-d.com/uploads/4484363/normal_60b5db1dcd67d.pdf
    • https://static.s123-cdn-static.com/uploads/4473892/normal_60004c30b3dd8.pdf
    • https://toxerixefekivi.weebly.com/uploads/1/3/5/2/135296371/rekexetiroxoxi_kevemovokulobi.pdf
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5fc6592fa3dcf.pdf
    • https://static.s123-cdn-static.com/uploads/4373753/normal_5fe26f1c1ad38.pdf
    • https://cdn-cms.f-static.net/uploads/4449998/normal_60387865867fe.pdf
    • https://cdn-cms.f-static.net/uploads/4422163/normal_6062daf9e8756.pdf
    • https://cdn-cms.f-static.net/uploads/4448556/normal_601a9aabc2f38.pdf
    • https://xotinibawilufo.weebly.com/uploads/1/3/1/4/131437660/908b47a5b5d712a.pdf
    • https://static.s123-cdn-static.com/uploads/4454544/normal_5ff65d90182ec.pdf
    • https://static.s123-cdn-static.com/uploads/4451208/normal_5ffe17fc31c0d.pdf
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/pokur.pdf
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/f343eb312e.pdf
    • https://rixilokif.weebly.com/uploads/1/3/4/1/134109141/wejuluzepizerapuwuko.pdf
    • https://xuzipitazejaj.weebly.com/uploads/1/3/4/7/134722028/8e0b46f6ba059.pdf
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/vomiwonixisop_wezizazofe_zililija_kozin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bekivuxuga.pbworks.com/f/evaluating_numerical_expressions_with_exponents_worksheets_answers.pdf
    • https://uploads.strikinglycdn.com/files/29d457f1-715b-4161-bfe4-1e426ebc9c39/47288398249.pdf
    • https://uploads.strikinglycdn.com/files/b5ccde85-ac03-4f0f-94fd-e31cec28a4ec/fikolixeme.pdf
    • http://wufamazajo.pbworks.com/f/how_to_lyrical_dance_for_beginners.pdf
    • http://veweran.pbworks.com/f/dawufulazixejifa.pdf
    • https://uploads.strikinglycdn.com/files/2559340d-917c-49bd-b3df-fd2f096efa15/how_long_does_red_cross_cpr_certification_take.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa83.bin
6f9a64a298761b5061a6746c60036e10ba280da37d30dcec6d447b0fa4eeda37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 5276 bytes
font_01_sfnt_off00010c76.bin
5674dc3b35ccd2a4ce42a4a6b4f78092bd8dca58de0856c09c4b088079b65d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 13396 bytes
font_02_sfnt_off00013794.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13794 16060 bytes
font_03_sfnt_off00014c2b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2B 4324 bytes

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