Malicious PDF — malware analysis report

Static analysis result for SHA-256 f059a141217423ca…

MALICIOUS

PDF

68.2 KB Created: 2020-11-18 19:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f6c9849b64a814a19e5988c74105611 SHA-1: 9000762945f1238ec11d5d3fd5109964d973d758 SHA-256: f059a141217423caacef460993cca9bdb352162b4d0c0ed0244c9f27b7e6be41
96 Risk Score

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 that points to a suspicious domain, likely intended to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'case analysis answers'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://trafficel.ru/123?utm_term=ath+microtechnologies+case+analysis+answers
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f8a6a6f4e9fa.pdf
    • https://gorugofinugiv.weebly.com/uploads/1/3/4/3/134334376/4368477.pdf
    • https://vigasobokaj.weebly.com/uploads/1/3/4/6/134619364/vejakojo.pdf
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5f8fefa04bf83.pdf
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f9d0846a80e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c96c1bb7-a558-4928-90a0-aa48abdc62bf/polatazotumorosebu.pdf
    • https://uploads.strikinglycdn.com/files/c8b4a670-c374-4de8-9e07-77ce3da51ba8/leverage_penalty_call_in_football.pdf
    • https://uploads.strikinglycdn.com/files/2f691de7-7728-4f42-b6d8-85e9d3f452f8/lg_extravert_2_user_manual.pdf
    • https://s3.amazonaws.com/bugutaj/nepibagolun.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_off0000bee4.bin
fa404fe15cd9d7b6adb16a9c0f88b320363b5ca470d619245910b8403a0c024d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE4 5184 bytes
font_01_sfnt_off0000d067.bin
5236ee9f0427564673b7e5849fbb4e57909d0d7c3ec54614374547d7e015de67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 11068 bytes
font_02_sfnt_off0000f5d3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 4324 bytes

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