Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b22822c303d77f6…

MALICIOUS

PDF

84.8 KB Created: 2021-02-22 03:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 78310e82eeb8ef8769ca1722d4508da7 SHA-1: 672e686c6cd0e7811ebd7150a8000c55568f5a8c SHA-256: 8b22822c303d77f67d11d1821af8bc5747bd09fc806c058bcafaf149bb9b5b4c
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI, pointing to a URL that appears to be a search result for nutritional information. This suggests a phishing or social engineering lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the presence of an external URI indicates an attempt to redirect the user to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=how+many+carbs+in+impossible+whopper+without+bun PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452382/normal_5ff25d94a3849.pdfIn PDF document text
    • https://nasejanebuxilas.weebly.com/uploads/1/3/1/8/131856105/8351113.pdfIn PDF document text
    • https://nolizusumebixaz.weebly.com/uploads/1/3/1/4/131438071/fotobi.pdfIn PDF document text
    • http://metryck.info/52056851530n0vv7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_6029d5d3f2e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_600fa71364103.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/fosobed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5fec09c600064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fd23ebac8902.pdfIn PDF document text
    • https://nomalepizu.weebly.com/uploads/1/3/1/3/131398516/rewelisivufovof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5ff160feba5b3.pdfIn PDF document text
    • http://4escam-bot.online/40670954415mb3ei.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414851/normal_5fdc26a367c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_60325c7c06254.pdfIn PDF document text
    • http://gufutaca5.xyz/nebewekop1hjv2.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/bexolamabad/64398313885.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/atomic_habits_romana.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/dutosadofetupaxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/jejujej.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_off00010cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFF 5468 bytes
SHA-256: 3f3e001191b9c8570f4c2729bfbafe0c4312994e2f897227d2e0735296d9b999
font_01_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 11236 bytes
SHA-256: 76571f6e7fbaf50af3c47a9ac88902fcd4136e8e8e824415edc97bea1eb333fe

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