Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f17e2ae91f5179…

MALICIOUS

PDF

71.7 KB Created: 2021-01-08 15:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0584a08db3f3950640a86205e82e906c SHA-1: 20eb1a962e20cdbc17e0f8e1f0aedc7ace86348f SHA-256: 89f17e2ae91f5179ef6d866c4b7c3a13fe3e7f7ce2cae447c94cb3fd49d6b8e5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffking.ru', which is likely the primary distribution point for a malicious payload or phishing page. The document's content, though heavily obfuscated in the provided excerpt, appears to be a lure related to academic essays.

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/aws?utm_term=ib+extended+essay+guide+geography PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5fb686db9e811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fee530a3b81b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5f93f405cd387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_5fafa3c3e8584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_5fc37e8fbb26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8951e74d3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f8ca3c11b7d3.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/3eaaab16-44a7-4b2d-8901-0be245ae7a83/96094094452.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/74779450590.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/46877987353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f5b85e-9734-456d-a363-7a8f8142b120/little_tikes_junior_activity_gym_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c9ae603-a394-40ab-b6c7-9d64a1e49842/67984002255.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/guitar_chord_arpeggios.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_off0000dbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE9 5436 bytes
SHA-256: 49b75cfe5536aebd0ff822962804e4dc31a8c786b32438eb548ef8520e342e3c
font_01_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 10416 bytes
SHA-256: 7c12547848f40c01f798b89d0689df5f38c52be0d8a3552f4c86b964c1e2b55a

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