Malicious PDF — malware analysis report

Static analysis result for SHA-256 66924038fd7b05fb…

MALICIOUS

PDF

75.2 KB Created: 2021-05-13 14:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9693368086242495d0f858433a7f138 SHA-1: 2eff016ddc65995bcc14d7a07f9ae608f062f706 SHA-256: 66924038fd7b05fbc3a1d203d5200e86ccea44fbcde336df816118d75ed7239b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://jacksth.ru/strik?utm_term=types+of+health+and+safety+risks+in+the+workplace PDF link annotation
    • http://ninotekega.mygamesonline.org/89669594321.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/wituraneluwalakeluwuwu.pdfIn PDF document text
    • http://mif-smeh.space/kinepuniwidgfng.pdfIn PDF document text
    • http://jinobuzid.scienceontheweb.net/bamajawurevudafo.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/solution_manual_of_solid_state_physics_by_charles_kittel.pdfIn PDF document text
    • http://expressday.online/cognitive_behavioral_therapy_worksheetsq8ov5.pdfIn PDF document text
    • http://usechambre.xyz/what_are_prime_numbers_between_1_to_10000lszio.pdfIn PDF document text
    • http://pifofobexaxel.mypressonline.com/epson_stylus_nx230_ink_walmart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_35ca9916246e41d395417ea963857e95.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_31149341dfbe4c0f8e8b429a9bfea5c0.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_2fca797d08104078ad8244106e4ef760.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5975869f-27e3-48d6-b1a2-a8dee266fb79/causal_comparative_research_design_purpose.pdfIn PDF document text
    • http://sufixis.myartsonline.com/arthur_schopenhauer_the_world_as_will_and_representation.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_494b17ce9f424d42b71fa1aa393e5cb5.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_378c1901f26d4a34b11ee2e7a2eb088b.pdf?index=trueIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_706053c4dcb3489eab8084b6a868eb63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d262b0-321f-4216-a0cc-d316182cf17b/sikipobuzotuvizuv.pdfIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_e3c43453254045b680f7af5a30f32680.pdf?index=trueIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_99d0e0e4e7624c4c82eb23e51a8c724f.pdf?index=trueIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_977f32ffe42a41f1bede41748187d07b.pdf?index=trueIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/6656007294.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_d86da8629fea4538a6510670cffe417e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5452 bytes
SHA-256: 6d0743eadeeb4352e76c5483784efe32f639365c22b2fbacb2e5e1ffa37d52a8
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 10876 bytes
SHA-256: eebaedc04ca8aea2c4855d5932e715017626d21e810469bc10280b9fba6b4cf3