Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ae7f6833f0e97f…

MALICIOUS

PDF

77.4 KB Created: 2020-12-28 20:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7e25a2cc3593ecc5d3756ede7a2ef9ea SHA-1: 32b407ed87f1cee9000a90ac167f6602c1753b6f SHA-256: 03ae7f6833f0e97f3c194d6d4f6cd7d42d808e921586b42811f3b29db47bb00e
274 Risk Score

Malware Insights

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

The PDF contains numerous embedded links designed to lead users to malicious redirectors, a common tactic for credential phishing. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically identifies this as a UPS impersonation lure. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an intent to redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/6372342.pdf.
  • 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://traffine.ru/strik?utm_term=riot+blockchain+stock+price In PDF document text
    • https://cdn.sqhk.co/xavipinav/gHiiifS/jawubasinomofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5fea0805369ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5fe57bc0ccb18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5fce2c648a9bd.pdfIn PDF document text
    • https://vigelabed.weebly.com/uploads/1/3/4/3/134368569/6372342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_5fa2288b380c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5f985a8576b60.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/47fb07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23caae0e-59f6-499d-829d-54c0f13d9ad6/77350010625.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/jurnal_cacar_air_pada_anak.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/anker_soundbuds_bluetooth_earbuds_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8d4735-f543-45f9-b441-6b3fe33ad2c3/hitchhiker_s_guide_to_the_galaxy_catchphrase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b2fea0-514d-4a2c-a372-c530a792055f/safuwavedakux.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/50826928007.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/tasapekepetipapelew.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/lunofeninuvifimobipavitaz.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_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 5232 bytes
SHA-256: 6cb5811eff79f5608a1d47180279d8429a2c5ebe903f6371e9f691b7e5b96e59
font_01_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 10976 bytes
SHA-256: 1b63c5a445988b07afc81cbe2b7ee402d353e9b9ea722088e1c81ddc32d16d2f

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