Malicious PDF — malware analysis report

Static analysis result for SHA-256 4288f1c633bb1ff7…

MALICIOUS

PDF

72.1 KB Created: 2020-12-26 05:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b7b6a47efc695b91cb000bf57d9e087 SHA-1: 18487ea29baee87655a51a93cf03c7f7ff783ff0 SHA-256: 4288f1c633bb1ff783c9fa5dffe2377260c1629d66948bef10ef2321b774d8f2
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. The presence of an external URI pointing to 'traffking.ru' suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used for initial access via spearphishing attachments.

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/strik?utm_term=cut+off+at+the+pass+etymology
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/votorij-vazevaludunavov-vaworudifax.pdf
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/fb75f1ae9.pdf
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/lanogik_sikibodusoxuno_kopisomobegu.pdf
    • https://static.s123-cdn-static.com/uploads/4384483/normal_5fc4b4303d1aa.pdf
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5fb29930cea37.pdf
    • https://cdn.sqhk.co/jesisuvov/Mehhiij/minijifekeset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lejivugeleguwod/14058571903.pdf
    • https://s3.amazonaws.com/tazopaju/circle_theorems_proof_worksheet.pdf
    • https://s3.amazonaws.com/rixevozajixezos/solving_graphing_inequalities_worksheet.pdf
    • https://s3.amazonaws.com/xafaxotaful/calling_all_the_monsters_sheet_music.pdf
    • https://s3.amazonaws.com/widuxade/boating_safety_course_manual.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_off0000ddb6.bin
a267ae22c15113db51d7e591ac845134bb7a80c1198c908567b94448b3a7295f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 5228 bytes
font_01_sfnt_off0000ef6a.bin
3f17bdcae1652f46fe37a7bc9c95177e78faee3a55472a170ce1349de41871d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 10596 bytes

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