Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df48fdb10feb83d…

MALICIOUS

PDF

64.8 KB Created: 2021-02-14 19:07:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71d4640c09ff37cece5b8f761c8785ec SHA-1: 921da50a0db84282875174111bbfd5e7c50e9a3c SHA-256: 9df48fdb10feb83dc3568ec14d653830f4a6a5c09ac27aa2a646b24e216a188b
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-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://yafferge.ru/wix?keyword=multicultural+health+2nd+edition+free+pdf In PDF document text
    • http://shoop-fg.ru/first_grade_grammar_worksheets_freettkjl.pdfIn PDF document text
    • http://dompodklyuch.com/jedulogutujekogotr92y.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/niihcjh/water_type_monkey_pokemon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491152/normal_600f6b51eb066.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/16SFYVw/racing_car_race_game_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/cifpQ2T/vanished_world-_infinite_galaxy_shooting_battles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467038/normal_5ffb5dc1ec271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445104/normal_5fd2f32398a22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446287/normal_6002d17c3af35.pdfIn PDF document text
    • http://ins.expert/bhaktamar_stotra_meaningj59h0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff10fd48074e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488100/normal_5fe948a939a32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xakusineba/29419350882.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/coloring_sheets_paw_patrol.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/6559391622.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/aimware_free_csgo.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_off0000c338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC338 5200 bytes
SHA-256: 6c415819172b7a409881ae220024eaf5333d29f1bd9e485d623a449652f7add1
font_01_sfnt_off0000d4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F0 9648 bytes
SHA-256: d066c3f4d659b8636ebb3cd7dc0b74dfc3558451a5d4aa4d46f504754879a871

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