Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97a7ca39f66bffb…

MALICIOUS

PDF

82.8 KB Created: 2021-04-27 11:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bac328761b602b2900054f04e27fd346 SHA-1: 9e8b2bc91e51ac424b1e7f326d87661d4faf9966 SHA-256: e97a7ca39f66bffb97595a7762f9e52c992373381373833aeafe0600692d6b7c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are hosted on dynamic DNS services or personal domains, suggesting a link farm or distribution network for malicious content. The 'SE_CLICKFIX' heuristic indicates that the document likely attempts to trick the user into executing a command, a common social engineering tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=how+to+find+out+motherboard+model+number
    • https://xodimazu.weebly.com/uploads/1/3/1/4/131408168/gunabinuzaju_gugogafetazaj_rufixidujariwul.pdf
    • https://xesufomoma.weebly.com/uploads/1/3/1/0/131070197/5060587.pdf
    • http://alternativeinfluencenetwork.net/51359470870i277v.pdf
    • http://edalovert.xyz/remewenewafukebaripabukovifip.pdf
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/9512603.pdf
    • http://meetsol.xyz/4557323911hup8x.pdf
    • http://feyakast.online/81958658156x5djr.pdf
    • http://roxedizusugu.mywebcommunity.org/8152702180.pdf
    • http://xasanefajisa.sportsontheweb.net/78552644827.pdf
    • http://ultra0.space/59276970130ajdfd.pdf
    • http://yachts-4-sale.com/voginisokezetiwosrm36p.pdf
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/ff9b9f90b8c.pdf
    • http://chambrehub.xyz/average_digital_marketing_manager_salary_uktpnyj.pdf
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/8249270.pdf
    • http://xadazobisisim.scienceontheweb.net/tunidasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_45ec4397b59346ac813f419e2ec7b258.pdf?index=true
    • https://uploads.strikinglycdn.com/files/02d608cf-78a1-4fac-b497-b3b9d5193613/the_psychoanalytic_theory_of_personality_development_as_postulated_by_freud.pdf
    • https://6e00f30c-c2f4-4f8b-b3fa-04142e93d3a6.filesusr.com/ugd/7b3c9f_4841a53652c5454cb8f4dfee8ed31c79.pdf?index=true
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_95bc31ca1dd84dc0b7264c96b7c23a4b.pdf?index=true
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_dde2af2c584645599a84a725dc479171.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a829eac-b892-4f0e-86f5-f451557f69bc/27029960668.pdf
    • https://uploads.strikinglycdn.com/files/a4b6b904-f437-4c17-8cdf-3a3c824b6203/45875131239.pdf
    • https://uploads.strikinglycdn.com/files/bd84c3f5-31f1-4c62-82ec-4ad995c96896/pufifilidelanubetena.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f027.bin
4cf8c9a16966b99b10ccfc4bd8b1dafe0fb66ab956501f98919803a6aaa445d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF027 5044 bytes
font_01_sfnt_off00010117.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 1800 bytes
font_02_sfnt_off000109a5.bin
eb73bd1de49111cd558915d00e45bc780960a89ba38d7bbd97106f8f64a6cce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A5 10952 bytes
font_03_sfnt_off00012f12.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F12 4324 bytes

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