Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e54bf7bf26ba90d…

MALICIOUS

PDF

60.6 KB Created: 2020-12-15 13:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 651b05ca233aa6a5ea3868df0ae1597a SHA-1: c25758750b07fee8139b6803f53a8a66fca8530d SHA-256: 8e54bf7bf26ba90d6f1989cb830b217f900524d0b87d30895801a198771f472b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely intended to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=xnx+honeywell+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5fb99eeeacf68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5f9c41c19edd1.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/1031146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5f8f31a2f2b3b.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/300a75640dd.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/660a2a13-2a23-4874-91dc-9476818b7b96/57447305118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a30574e-85b6-4a87-9376-195d4f4a2b97/13310539966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ef7424-ca01-4ac1-9b48-c81c6393946f/43000627943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18089754-e952-4dc5-8d5a-9f0547a29d31/winchester_1897_trench_gun_stock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d194ead-5ab9-4282-a3c7-a664de9cd46e/2014_jetta_sportwagen_tdi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4e5d0a-62c7-43eb-ba8b-bf5c45088e8f/madden_18_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e823e26-9efa-4d71-bcc2-fba6c3c12663/betakuvarajebewurezor.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_off0000b422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB422 4888 bytes
SHA-256: 4b6c8788815f8d289c350aab8e4bb8bb5891a47294a5f93b3abeb3ac4a8e8eab
font_01_sfnt_off0000c4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AB 9836 bytes
SHA-256: 988337a3f105973d3a7116a507e026ea97a4e1278571612271b218e8b68aa3cc

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