Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06c1f60779f312a…

MALICIOUS

PDF

96.8 KB Created: 2021-04-20 00:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd311ec80e7e4c7724bd3f90c8bd6ac SHA-1: d9893daf0debb15e804d25d101e551df81d60fa3 SHA-256: e06c1f60779f312a55184bf9667a79d499daba9adf1770dc56890cfcb30a39ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, which is often used to create SEO-optimized content that can mask malicious links. The primary intent appears to be directing users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=the+art+of+seduction+quotes+pdf
    • https://cdn.sqhk.co/dujagazatad/kLJkgcK/jupoxerukofalirat.pdf
    • https://cdn.sqhk.co/gasariba/ifgenZO/29412797729.pdf
    • http://espaceabonne.com/guild_fest_lords_mobile_guideiqc8j.pdf
    • http://olymptrade.buzz/turaxedoz4xi87.pdf
    • https://cdn.sqhk.co/mimizajig/em49gij/guess_the_film_emoji_answers.pdf
    • https://cdn.sqhk.co/numiwuzuwix/cJ5Jhg1/theme_park_sim_pc_game.pdf
    • https://cdn.sqhk.co/raguwubives/vbjeugg/26979272860.pdf
    • http://jezopapurowejen.22web.org/giguzakelezed.pdf
    • http://astropsychology.website/officejet_6500a_plus_printer8z64w.pdf
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/sowufanixapo_sejanozujigo.pdf
    • http://sushibara.net/hilda_creatures_cheatsb1nqn.pdf
    • https://cdn.sqhk.co/zepaginu/hjHCNgg/xikidet.pdf
    • http://probmake12.xyz/pevotakijw5li.pdf
    • https://cdn.sqhk.co/tawumemikuva/hjaDSjf/navejizotutose.pdf
    • https://pexefosakojoma.weebly.com/uploads/1/3/1/4/131406105/rozedoduk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gikutixutawax.epizy.com/37261709090.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_off0000fd92.bin
7efaa4dd8474967a4ff810873a74516e1b136822de0d3d3d5140464ace796a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 5168 bytes
font_01_sfnt_off00010f1c.bin
2ebbc552e411a90c4122fff8de8673ca3cbc7b20a951fc3b7b1ad260aa17771d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 25252 bytes
font_02_sfnt_off000148c6.bin
1b5533d48dee4a1216bedaefcb2050c50330d0ba476fa193e34b9c2c0c26e53a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148C6 19620 bytes
font_03_sfnt_off000168d1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168D1 4324 bytes

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