Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29a7a1cced8c161…

MALICIOUS

PDF

84.6 KB Created: 2021-03-14 10:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0bc38791f9669d5e667d68a0e09ac4af SHA-1: 27e7889f3ded17ed79885245fc24dc87f296e97e SHA-256: a29a7a1cced8c1616a43250331a97d17bfd53cf42a10ba25681486e3f9c8a762
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically targets a keyword related to technical drawing manuals, suggesting a lure for phishing or malware distribution. The presence of external URIs and the link farm heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/award?keyword=technical+drawing+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/wiwuwigo/hgggXdR/99746463053.pdfIn PDF document text
    • https://cdn.sqhk.co/luvafuza/UCWOjjt/strapless_corset_formal_dress.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_60275ad6c4941.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/jf2Glih/never_have_i_ever_questions_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fee534562cf1.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/4eigjjR/rirefonumega.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/6Q5gegf/6479392885.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/jg0POU9/efootball_pes_2021_ps4_patch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fd08e377328c.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/9278296578.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/iipYYUd/bottle_flip_extreme.pdfIn PDF document text
    • https://cdn.sqhk.co/texirova/N8Lihhj/peking_duck_duck_duck_goat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386089/normal_5fd131f0575fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368982/normal_602d6358187ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_60354e19461c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/how_to_make_a_simple_remote_control_drone_at_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e1277e-1207-4b17-99a9-0f313a10d002/10484019542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e7d35c-6e10-47f7-9336-ea5640dd76b8/what_is_verbal_communication_explain_its_types.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128f9cfe-05ed-4edb-aaa8-7310aa4092ce/86149596007.pdfIn PDF document text
    • http://romakilax.myartsonline.com/accurate_ring_size_guide.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/27639202190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b35757-47bc-4aa3-9e87-7f896eda08ea/focusrite_scarlett_4i4_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071b407d-8059-4203-970a-81bb8cab000c/what_is_christian_intercession.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_off00010d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 5432 bytes
SHA-256: fcb42726da5591643d781aedd78d02634c3618f75309560254570a9d703ca1b6
font_01_sfnt_off00011f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 11104 bytes
SHA-256: 8a0c2b332f3c3b548631d6c40084eaddbd9636c5301f157fecad11ef06c14d77