Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b8f6de90e38f81…

MALICIOUS

PDF

80.2 KB Created: 2020-12-27 14:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 837e555c9cd03c5581e063d6a40949bb SHA-1: 23a16958f0a764407c01ea1e3c2360ca96fb4876 SHA-256: f7b8f6de90e38f810067e6c5d027f32c3b6d5bc6d3d92ed2c9b3448fb33ae9b1
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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=how+to+get+rid+of+mining+fatigue+3 In PDF document text
    • https://cdn.sqhk.co/siwemawatu/fljjcic/lotukalixogeranizax.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/jgv9Nhb/metal_slug_anthology_psp_save_data.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/T13IGeK/diy_bookshelf_ideas_for_small_spaces.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jfEumhj/wiwamajafubaf.pdfIn PDF document text
    • https://cdn.sqhk.co/gumoxixo/16Jrgco/78591857021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482189/normal_5fe7809b2211d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_5fa71c59f39bc.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://uploads.strikinglycdn.com/files/68e356c3-8266-4431-9d58-2f275b88b9e5/download_crt_video_geometry_calibrator_dvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc197315-2e4c-47dc-89ef-3ded3264fda8/kinixolalekanojelopilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2636efd-2750-4dc0-b501-76e54cd292c3/11385279520.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_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 5116 bytes
SHA-256: 9ce42631eff0e27dd25e3d58c03f6e73e8681aaad46d89efbfaf4c0d3bf73861
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 10952 bytes
SHA-256: 40da32c6d84f3e6a09187078621646d3afbbecb98e610910ad141610dbc8759e
font_02_sfnt_off0001268c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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