Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a1f0d7d18f2ff1…

MALICIOUS

PDF

68.1 KB Created: 2021-01-01 01:03:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9c23d8f5f481aef36ecf9c377c8d7352 SHA-1: c20860fb8feb9f87322aebd6c19af4fdf3582690 SHA-256: b9a1f0d7d18f2ff1f3545e75498888c38b87c89bf2c312ae60f93892c65384cc
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 critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/strik?utm_term=classic+helicopter+auburn+wa In PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5fc401f2cced2.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/7bd5148154a53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f8730752c5f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410216/normal_5feb9bcf5ef93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481522/normal_5fed6c36d3abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fb67e10cebfb.pdfIn PDF document text
    • https://cdn.sqhk.co/jilijibimi/geibiaF/ssc_calendar_2020-_21_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/OESBhe6/pomesutolufitok.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/redubunutupijewo.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/nokiva/fiwajilasobe.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/honda_cb_900_f_boldor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/blitzkrieg_2_free_full_game.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_off0000beff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFF 5160 bytes
SHA-256: 890758bfba7d0e55b8e29dd3c2b442cdc6180eb45e9b08052e1dcfcafb357c96
font_01_sfnt_off0000d08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 10348 bytes
SHA-256: 825aaa26b04adaae0c4baed7ba186ff921c2e1523e4d1bce5791fd25f77ab85a
font_02_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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