Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd155fdefb257647…

MALICIOUS

PDF

73.5 KB Created: 2020-11-19 20:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4a943f005d2e944114765fa404a102b6 SHA-1: dd5c1ec2b35a048f29949cc5c5b7e5d2a1f5b20e SHA-256: fd155fdefb25764778740266fbeaf0fd1e1dfe7a06053e97be11cb1e175c5ca8
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://ggtraff.ru/strik?utm_term=adventure+of+a+lifetime+mp3+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f953a4329fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449996/normal_5fb041d940f32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fa31204b1abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_5fa74ac0613c5.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/c4e3b0d1-bd2f-4ebd-aca0-67dba48f7f1d/pawemoba.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/parts_of_a_fish_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603821bb-7859-4da0-b619-25d679aa4b51/raliko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28bdee8-382f-42ff-94f2-5eb4f53b3f22/zizukifegetefat.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/81832702668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c9fb60-d416-4465-b85d-b30ad6c7c2b8/black_magic_love_spells_that_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e11147f-d757-475d-9e12-0a3922477d7a/lajadakirigujoxir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a90871-21b9-4d6b-9d71-69f4c99586e4/zeradiji.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC746 5316 bytes
SHA-256: b191cd75f883ebcc5092fc14184215542c8df54ae1438ea1abc0978e8fba585d
font_01_sfnt_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 13268 bytes
SHA-256: 3f670ee16decf211dad3599c41afa79eec2e42a1afbdc3f918ff92d3a683c02f
font_02_sfnt_off000103c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C7 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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