Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ee351ceec7613c…

MALICIOUS

PDF

97.2 KB Created: 2021-03-19 20:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5cce3547cb84358b8581d09c5c43378f SHA-1: 9b32df4ba15fabdebc33b06395ba0078b258e8f5 SHA-256: 30ee351ceec7613c969fcc5cd3aa3f49abbf8939e6c6b9ffe72f963dd456ef37
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+oil+a+kenmore+sewing+machine+148 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480408/normal_603faddd95e75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488336/normal_5fe473245710b.pdfIn PDF document text
    • https://cdn.sqhk.co/ninasodivofi/cribcig/jijilofu.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/jai1hat/best_slasher_build_2k20_that_can_shoot.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/Bmbhctb/fallout_3_game_of_the_year_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405430/normal_5ff2137c78a8c.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/j4ieuTY/lubofezotunilabav.pdfIn PDF document text
    • https://cdn.sqhk.co/zezerixuwab/rU8Tjb9/26379270997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414848/normal_5fde72fa051dd.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://uploads.strikinglycdn.com/files/20cba9bb-d33a-4ee2-9ebb-a5fdbfeaf6d7/how_to_write_a_table_of_contents_in_apa.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_2b768dcdea084b5e862800ed8db605fc.pdf?index=trueIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_e09dae6e56154f7197b69091f387486c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c6318a-ece7-4195-b2ff-58bff76fa31a/kisomeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9344a9d2-0660-4148-82ab-fbdb5ade277b/how_to_reset_check_engine_light_on_2003_chevrolet_trailblazer.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_fc19001316ec44deaa03f23f9e62adef.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_d3c3c6f449884ca7bb681ccd06d01f4b.pdf?index=trueIn PDF document text
    • https://30bb9d03-04f1-4043-8ca4-b11f08dd7d37.filesusr.com/ugd/82ab19_bb3bc795953845ffb4fe738f52b78e7f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6e4fae-c181-4f0e-a53e-63a2428bc975/gelesa.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_372c26695b8d42f5b9f440b1042afb0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c2aa44-f0d4-4c56-b787-e3aec24d9172/68949346255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28277fb7-bdaf-4fee-8a7a-e3ccdb9d1890/learn_autocad_3d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0812067a-1203-4fde-bfe3-3b1a3ad15fa1/fidugelalej.pdfIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_278ea843c3584a50b1362c550390b9a3.pdf?index=trueIn 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_off00013075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13075 5452 bytes
SHA-256: 48ddbfa2cb583028d2c7f17bb7f73e5ad2bd8712681c561b2fd4e08d6fc4c84c
font_01_sfnt_off000142dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DD 11132 bytes
SHA-256: a62703e8e30e26e2c8df3e6d2c49547c4435a7fda45be59d24c6dab0e8bb2267
font_02_sfnt_off000168c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34