Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85a3388fc86b30d…

MALICIOUS

PDF

73.4 KB Created: 2021-05-09 10:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f17b98fe9421b7ca4a9c9b61c1f51816 SHA-1: e34b34858d617d72e56f11c617391a3a0f6eb00f SHA-256: d85a3388fc86b30dc55d2017a6ca342d32caab0802920c4c0aabae961b895ee9
216 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam attempt, indicated by heuristics flagging it as a 'Payment redirection / bank-detail change lure' and a 'Callback phishing phone lure'. The presence of numerous external links, including one to 'baarspo.ru', suggests an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through social engineering tactics, likely leading to financial fraud or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/strik?utm_term=metro+employees+credit+union+routing+number PDF link annotation
    • http://nagesebaz.iblogger.org/wunatagojonojak.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/0lE4uW6/jagupozalemediri.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/hjdJn6k/megan_rapinoe_mls_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_6033dd300589d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5fdecf6fef7ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/dependent_and_independent_clauses_worksheets_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5baf13-d889-496c-b74c-0b91a2e1d790/zepinapa.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/cider_ios_android_apk.pdfIn PDF document text
    • http://wapanemajefo.rf.gd/jzyk_angielski_wiczenia_oraz_repetytorium_gramatyczne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04985777-7936-4640-b770-e0080f23c384/jaxiladuves.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_8273911a4e1f4a958c33f7d0effa20d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/are_troy_bilt_mowers_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0f41b8-e192-457b-bbb8-5cc92feed3be/selopalitujuzaravele.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/takevofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28dc94e-170c-4442-b86a-e75420cb9685/lakudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d17f630-1317-4f08-97a0-984ab4ba0fc2/thule_roof_rack_instructions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/22682246477.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_9f1781885c934c58afca3f98a0cbcfd6.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 5432 bytes
SHA-256: 70f71d49ce5736ef63922c0c507fd2eddbb16fbe22e8a65f27d6ace73931dfbd
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10608 bytes
SHA-256: ed5a49c75de56ace1e4f1d08d7e56add4b8422379d3e59cabe92c56d30fb57c7

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