Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91059c573ba40b5…

MALICIOUS

PDF

62.3 KB Created: 2020-12-17 07:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2d6b9b13fc224f75670ba64dad92d626 SHA-1: 2840470399e7be4dec47e485d4aab2fabff17032 SHA-256: f91059c573ba40b5f1333bba5c5078e270412a94697424da004a0090a10a7c7c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffking.ru, which is disguised as a tool for axle bearing replacement. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL within the document body suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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=axle+bearing+puller+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fa118f1b55a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_5fb86f38a4d7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/woberiz/animus_stand_alone_apk_e_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/545b5ae1-22f8-45a7-afc1-0043bfacd04e/bose_soundlink_speaker_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0960fceb-97d8-4aca-97ce-092dddd0decc/kaplan_usmle_step_2_cs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfec4eaf37e3b64620e84/1606287044214/55837255607.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5359940f1034a5cc50b70/t/5fc86684bbb7f45a92896ec6/1606968991583/zowebuxifepivezalokoka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b4e4c89e1c4b8fbd626a/t/5fc0f6f13570fb44d125b827/1606481652438/zunivotoruw.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/zabobuwizud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15fe61f3-8d5c-4698-b58d-6e1d907bfcbe/persuasive_speech_to_stop_global_warming.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/xibizafubokakeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA93C 4888 bytes
SHA-256: 47a309edc42c5a1a90ad14c847c8c5a1081af26cb6835fdee57cbbe30eaaee1d
font_01_sfnt_off0000b9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E7 10432 bytes
SHA-256: 13ba7f66edd978de8269f45b205e6b857fa20f735f6323dfcbf1306ae3ee6cf0
font_02_sfnt_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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