Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9421456ec00add2…

MALICIOUS

PDF

73.2 KB Created: 2020-12-21 05:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8970a496c0a07d40dbcc3dc846a7f5 SHA-1: 7570b78e2cb2225937c9de3c662b2cf000225e3a SHA-256: b9421456ec00add2414db092ff940bdc95fda945df1e559c492f8aadb43c5a6b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier returned a high probability of maliciousness. An external URI pointing to 'traffking.ru' was extracted, suggesting a phishing or redirection attempt. The document body contains garbled text, which may be an attempt to obscure malicious content or exploit PDF parsing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=answer+please+in+french
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5f923463297bd.pdf
    • https://cdn-cms.f-static.net/uploads/4417221/normal_5fa5b35e280b3.pdf
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f9b7ebdb9960.pdf
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f9400041ba6d.pdf
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fd17e6dacc63.pdf
    • https://cdn-cms.f-static.net/uploads/4416654/normal_5fb8a672edc94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0719484d-115d-43fb-af55-6d7bf45abd48/35207309406.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48f0eaf37e3b6491d2e8/1606371568654/goku_all_transformations.pdf
    • https://uploads.strikinglycdn.com/files/ba3e9d94-b325-414f-8b15-c5f8013434aa/99145651367.pdf
    • https://static1.squarespace.com/static/5fce05559c32423a38e562d5/t/5fd02921a946005758745143/1607477538390/56793035619.pdf
    • https://uploads.strikinglycdn.com/files/07f87327-aff7-4b14-8653-850f50316cce/district_196_community_education_swim_lessons.pdf
    • https://s3.amazonaws.com/poguvelefa/broken_vessels_flute_sheet_music.pdf
    • https://s3.amazonaws.com/fakuguvil/23258175437.pdf
    • https://uploads.strikinglycdn.com/files/83876cbe-8e06-429b-bb59-ba25d481ec2e/77087486361.pdf
    • https://uploads.strikinglycdn.com/files/8a4b5769-d433-4a4f-a3f9-c33674044e66/29329655059.pdf
    • https://uploads.strikinglycdn.com/files/92a5e2a0-4ac7-4c89-a4b3-1ee2d6d60cac/hoover_steamvac_manual_spinscrub.pdf
    • https://uploads.strikinglycdn.com/files/f1a9a662-f80b-4ef3-b740-4da012afc1d9/kafewozasakosagide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca13.bin
6ee1598b1a881e29c64360098de2e0a9a71efdb63eb7c93d3c4b2b81152ea791		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 5184 bytes
font_01_sfnt_off0000dbc4.bin
55f2023e096507b8ab5fecfbb8cbc37f815b5147da92bc54680d3b448fb9419e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC4 12140 bytes
font_02_sfnt_off00010346.bin
eaa138153142e1b202f6e132b5b79d2ae4483da1523e62d7c19f47fa5ad289e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 16068 bytes

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