Malicious PDF — malware analysis report

Static analysis result for SHA-256 36916692758cda41…

MALICIOUS

PDF

65.7 KB Created: 2020-11-23 09:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 80bf50dd896b26b1d5ea09da97535714 SHA-1: 1242449c18ba987fa81230d858db4e861d5eafc2 SHA-256: 36916692758cda411d945447bf53af48803013e4be3130cf9c8fc1adfcf8b6b4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://gettraff.ru/aws?utm_term=windows+7+boot+repair+usb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_5fb788273f16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_5fabf58893007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5f932a77e0974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fbb06240528e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415935/normal_5fb4ee483674e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_5fa1ae53beeac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_5fb376886b5e2.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/9537f1a9-9ac1-403c-9f28-c1d9dcef8cad/16998778292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d07344df-71e4-49bc-876f-fcb24c3a289f/togexigubabofazaki.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/ff9_ramuh_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdb61dd-1826-4aff-92f4-53047c033500/zevexotefiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/26643989505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae0a9fb4-25b9-4d85-a0d5-e404b78401a0/ruluzinozipi.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/pizifawive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7eb9de-e6ad-4cb7-90ff-d7f14ddb7440/pakoroxawobesofiwusev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f035fd27-9822-4f90-b28d-2d8c9bafc98a/despacito_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/takowixefejaxitavasugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d32ee3-0300-4fda-9acf-d98a2f119633/jarogelirirasal.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_off0000c6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FF 5248 bytes
SHA-256: edd5b79a9b4c80f2618dccd0510719e59641a13f2911cc65164a9c7b84512338
font_01_sfnt_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 9692 bytes
SHA-256: 032e676f65378d98b5e32cdd970a32395535335f3fa1d4dccab2febb3c7ae742

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