Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e095f85da479a4…

MALICIOUS

PDF

70.4 KB Created: 2021-01-03 19:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a6591160334f93658b0c94c35921d59f SHA-1: 747166f33e3d3a725e0c54641d4e9235e5b0ed5c SHA-256: 20e095f85da479a4f5e3c0ea5e78d4641d4f747b284dd85c98c17cf4a401e050
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=6+panel+interior+doors+30+x+80 In PDF document text
    • https://cdn.sqhk.co/firokizita/ijzjdQg/video_editor_app_for_pc_windows_7.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/5530711.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/AFjcvud/tiny_epic_zombies_solo_review.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/0ggLeaq/ww2_battlefront_simulator_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxeneson/ihRgijc/romidofitopimeta.pdfIn PDF document text
    • https://jimamejovegevag.weebly.com/uploads/1/3/4/5/134593921/fufevuzimewunanuxij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_5fb74942784a6.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/AqChhja/origami_lotus_flower_easy_step_by_step.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/97878.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/273a0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497110/normal_5fcbf76e2a065.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/1218879.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/HHgijcI/gelobojobo.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/xidulumexi/94269323440.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/63241788914.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_off0000d660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD660 5580 bytes
SHA-256: e9f14bf63c3f5a1ba9cc056dceca8bd94c2294b96165764469417d104ee6d53f
font_01_sfnt_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 10348 bytes
SHA-256: e9de793d143a4be7eaee9950e89fb3bedd5ef31f48690d82f510d57ffc884be6

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