Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff61abf3d9bed87…

MALICIOUS

PDF

83.1 KB Created: 2021-03-25 13:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: da1e08f8dfb5069524d3e68137519958 SHA-1: ff70751e69a53cf46bdfa9b7a5898522a6d662f1 SHA-256: 2ff61abf3d9bed874bb652ef30aec6c803d1d32d73d230a37a2745a6b69313d8
146 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or scam attempt. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or billing fraud lures. While no scripts were explicitly extracted, the presence of numerous external URLs suggests a potential for further malicious activity or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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) or Microsoft license-boilerplate 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://druttle.ru/infin?utm_term=advanced+counseling+skills+pdf PDF link annotation
    • http://freshka.fun/logixivuzozodedunegidixifgyar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_5fd22c4088c9e.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/vojew_lawoxovagavan.pdfIn PDF document text
    • http://rulabepotinujeb.mypressonline.com/limulawerojimajix.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/9f70c99.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/293e0a.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/xizate.pdfIn PDF document text
    • http://accueilcmb.com/plantronics_backbeat_go_810_wireless_noise_canceling_headphones_reviewi0fnm.pdfIn PDF document text
    • https://munivimisidifi.weebly.com/uploads/1/3/4/7/134772296/609850.pdfIn PDF document text
    • http://istlan.fun/vilenadefipapugimnfov.pdfIn PDF document text
    • http://vnds-v.website/cuales_son_los_13_signos_del_teatrobfiqw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_6000ecddac174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489713/normal_5fe2f0a6e0d18.pdfIn PDF document text
    • http://ca-management.website/construction_proposal_template_downloadlrczh.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/dajudavuvuvutujojokefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5ff0a24156981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_602c24a8dd88e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raxegujanamefas.atwebpages.com/10703209071.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/java_j2ee_interview_questions_and_answers_for_10_years_experience.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/80405797139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d395c1-28ae-4eea-b729-1a9e759d2c19/46351002525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7ef0a4-bc73-4888-a5ef-8de25cee52c7/kindle_voyage_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/reporting_radiographer_salary_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9a634d-7174-4ebf-8b7e-5ca73a79e438/96919375970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ca4a6c7-9833-46bd-a55b-259687a908b1/zosas.pdfIn 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_off00010561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10561 5340 bytes
SHA-256: 6469ff84a23625b7a5f7175181cfe77f1277e84d1fdedf216ab2e25e5045083f
font_01_sfnt_off000117ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AE 11416 bytes
SHA-256: 1b682c660701e6b31d216015513e7b7e78c9be9a385a2935e89dbf1acf30c6ee