Malicious PDF — malware analysis report

Static analysis result for SHA-256 3797ee5d606f3336…

MALICIOUS

PDF

97.8 KB Created: 2021-01-13 11:01:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 080d8050f0dbda43991b0586aca225be SHA-1: 9ea6505cbfafec977f7761a230c9835faf4c9ad5 SHA-256: 3797ee5d606f3336fa51fbb745b96cd0849d8d5d11a6c4e71cc1063684296539
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://trafftec.ru/123?utm_term=shin+megami+tensei+imagine+japanese+wiki PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410418/normal_5f9b7cf06bb86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ff3d2ad6ac97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_5f9aea4900388.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/5121705.pdfIn PDF document text
    • https://site-1176941.mozfiles.com/files/1176941/school_business_manager_duties.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_5fde886a1e41d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5fc4782c26f68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5fdc121c901d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f8b958099827.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/zuvovoxigumuz/kickass_malayalam_movies_free_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/6954192425.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001076c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076C 9308 bytes
SHA-256: 04d40f626da7e99249881f654830247798e04736d25e2b466e57c190a3410a10
font_01_sfnt_off00012677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12677 5440 bytes
SHA-256: 2e047b6a13195ae94c87fe611ff011e6779499acc1eb55b9d77e20a24194d38e
font_02_sfnt_off000138ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138EA 15160 bytes
SHA-256: 9c8ca90f81d5680cb315ce2b6579cd2d10eb0830a5433c90a9f01492f04db7e7
font_03_sfnt_off0001649d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649D 16132 bytes
SHA-256: 6c511cd2548aab1566dad8f54fccf2be4cd056cf5a4d5d56937977fde9165995

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