Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e419e840decba11…

MALICIOUS

PDF

68.6 KB Created: 2020-11-29 12:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545c1080eccc4f06dc195c3a76bf1da5 SHA-1: ddbac9fe5599d3bc2103993797f786bf10e55a86 SHA-256: 7e419e840decba11af7ed0a0f79e76dc31f192a4d53dd4f109975b3e7d9bd7ea
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffking.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'pencil case dimensions', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=pencil+case+dimensions
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5faf06dae1ba7.pdf
    • https://cdn-cms.f-static.net/uploads/4490264/normal_5fbb2a9117edd.pdf
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f90f786a03d7.pdf
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5fa73c8f4f8b2.pdf
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f8b9d5f022dd.pdf
    • https://cdn-cms.f-static.net/uploads/4489838/normal_5fb9efd0175f1.pdf
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5faa43cda53ca.pdf
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f8aa9ab6f71b.pdf
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f873f0570e26.pdf
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f98674915913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/susopuzupure/17246952489.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c460.bin
b703a15ca290a7a0e49cc2dcfee7bfd04d7f2095932852e73997cd0de7a7fab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC460 4696 bytes
font_01_sfnt_off0000d424.bin
df8bc11666d8dfebc130b91add3b39c0f0017b85c04b097f49f96947a77a9025		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD424 10408 bytes
font_02_sfnt_off0000f7db.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 4324 bytes

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