Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42171069b297a43…

MALICIOUS

PDF

76.6 KB Created: 2020-12-29 14:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0ffe2514b0118e0e8115fdcac0ebe0ca SHA-1: 3e2d1540f3501d846e527d7cb1c179bda17eeb85 SHA-256: e42171069b297a43c4a82194ef841d04067b2a50d51cbffcd7cbabe01e53f259
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high-confidence ML classification. The embedded URL points to a known malicious domain, indicating an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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://gettraff.ru/strik?utm_term=desiree+nosbusch+kinder+ruck+zuck In PDF document text
    • https://cdn.sqhk.co/tajiwikiter/WNAKT5V/cash_app_support_help_email.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/KHghKha/guide_for_fall_guys_game_ultimate_knockout_full.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/qLl0gj8/callbreak_multiplayer_offline.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5f99cb8fe2ef2.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/dukajevo/54481325160.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/flask_render_template_not_defined.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/38326928765.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/lebexaruvifetigokidutuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/nigewegelakevikara.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/agni_3_missile_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/rotafasaniz/dirt_devil_manual_push_sweeper.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/92356015559.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/song_chop_suey_system_down.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/south_african_cocktail_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/fiwerovudado.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_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 4840 bytes
SHA-256: 18b010c5a140f8985b30ccda12ad8de3d3eb204c2071a54ae984099757080ae8
font_01_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 11880 bytes
SHA-256: d8f9a4c4e0ac50e290775ed67f7a3b1c5ddaa3b2ac43d5ef97d07935646edc0b
font_02_sfnt_off000115da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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