Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab7f678455457c2…

MALICIOUS

PDF

66.5 KB Created: 2020-12-18 15:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ac73a2ba8170e0df9f3777e4364ac43 SHA-1: d6bbbfb6e3293a3120210bf5188143cc2143128c SHA-256: dab7f678455457c2c286e182e658bf0c8fb6b3c67a468e9ee65f87a02c37edff
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI heuristic further supports the malicious intent, likely to redirect the user to a compromised or malicious site for further exploitation.

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://trafffi.ru/strik?utm_term=milwaukee+harbor+trout+fishing
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakef/apes_2002_frq_scoring_guidelines.pdf
    • https://s3.amazonaws.com/daniwodug/52254055569.pdf
    • https://s3.amazonaws.com/zategafozasiru/fusionner_2_documents.pdf
    • https://static1.squarespace.com/static/5fc5756a6609fd0ee7b04842/t/5fc8f19e0b207364bc539373/1607004575508/fugubibisitunorabab.pdf
    • https://static1.squarespace.com/static/5fc529855e8e827d42a99b3c/t/5fcb14f5393ce473562dc572/1607144693715/79665295393.pdf
    • https://s3.amazonaws.com/nitizobuv/pigebadami.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/82347901401.pdf
    • https://s3.amazonaws.com/zifilobesumafi/zoxodomamuvinamu.pdf
    • https://s3.amazonaws.com/zuxadol/13365743456.pdf
    • https://s3.amazonaws.com/vibasujefir/2992633899.pdf
    • https://s3.amazonaws.com/pukaridimupo/black_backed_jackal_sounds_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c935.bin
c14d4bf96d76a876a9ab922ecffca078c130b74c213b56b32f6e6037245abe87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC935 5332 bytes
font_01_sfnt_off0000db6e.bin
399917c3238dc712e20bf81ab5012c7362b12d13f9d550ece4664264c05c5b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6E 9792 bytes

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