Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b827140d41e448a…

MALICIOUS

PDF

78.1 KB Created: 2020-12-31 01:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6eaed64adf169648a75a4ed6829ce9db SHA-1: d6513c45895c4b0f494a588cbd6416fd0401dbc2 SHA-256: 9b827140d41e448a8c9487778cde45b43b237dcf5b381e053375f296e04cda32
146 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, with one URL specifically mentioning 'mgm grand ticket office phone number'. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam pretext. While no scripts were explicitly extracted, the ML classifier and ClamAV detection indicate malicious intent, likely involving the embedded URLs to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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) 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://trafffe.ru/strik?utm_term=mgm+grand+ticket+office+phone+number PDF link annotation
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/fakiwedid.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/1432931.pdfIn PDF document text
    • https://tumupexaru.weebly.com/uploads/1/3/4/3/134333537/1811267.pdfIn PDF document text
    • https://sezulozag.weebly.com/uploads/1/3/0/9/130969806/jetimipofawu_tivixasutub_xujopaf_vezatubebejolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5fd322c9ce996.pdfIn PDF document text
    • https://rakikamizop.weebly.com/uploads/1/3/1/4/131437254/3522705.pdfIn PDF document text
    • https://sixoribena.weebly.com/uploads/1/3/4/8/134848884/9072116.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/bejenosugede/rebelin_en_la_granja_personajes.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/78496646173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f84906f-b50c-4e70-9815-2a5071518d6e/91652032585.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/71647185062.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/guide_michelin_restaurant_paris_7.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_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 5568 bytes
SHA-256: 7f09b7bcf14f07e468ff3933f9b351850205db124a592abbc9d24d440fa73b47
font_01_sfnt_off00010464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 11420 bytes
SHA-256: 6982d6a7acf2869b763e9dd1ff41ff98f295220f5799a0b91313351e4a505bf6

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