Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca7494ad376d8f3…

MALICIOUS

PDF

82.1 KB Created: 2021-03-28 19:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4126c56c516a4f94c07d41fedef94715 SHA-1: 446d0a98df0fc8fe0fc8af5adbb854a1b1654421 SHA-256: 0ca7494ad376d8f3fb6cb2f00385338b4f71f41d3da79d84494392947cc756c9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The primary malicious URL identified is https://maypoin.ru/award?keyword=amines+class+12+mcq+pdf.

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://maypoin.ru/award?keyword=amines+class+12+mcq+pdf PDF link annotation
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/dexedew.pdfIn PDF document text
    • https://zisafidavilux.weebly.com/uploads/1/3/2/8/132814196/32bb76a81db7df0.pdfIn PDF document text
    • https://watalixajine.weebly.com/uploads/1/3/4/6/134635748/e264d8b6d3.pdfIn PDF document text
    • https://kodetinerimaguw.weebly.com/uploads/1/3/5/3/135347088/5343280.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/toremegega_bumepaputuxuken_siruwusipijeda_jelibubim.pdfIn PDF document text
    • https://lejalapu.weebly.com/uploads/1/3/0/8/130874477/dekujisololun.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/5615537.pdfIn PDF document text
    • https://tetejinuditobig.weebly.com/uploads/1/3/5/9/135973847/rilabobe-wogigasirafo-tirudo.pdfIn PDF document text
    • https://depesusexufajev.weebly.com/uploads/1/3/5/3/135351117/pozepub_vegezuwanal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa6eca1a-c690-4a36-985e-a873157a80b3.filesusr.com/ugd/081493_0ffeb70604144c9ab23bd2047eb272b5.pdf?index=trueIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_5bed367583274c15a0c5e2b6f44335db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fb9628-4c88-4a2e-a2ff-a46ab5cf6868/32212427243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4daf0471-6ebc-4620-a0ec-9a095ba6f860/how_to_put_water_in_a_bissell_proheat_2x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31d13cfc-88b4-4f74-9a20-5f97fee6844d/8634817001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4628655-2cd9-496d-a0e2-54ea5b046919/average_speed_equation_calculus.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_cf82e5434e0247aaa39fe263efcdc894.pdf?index=trueIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_2607e5afbefc44ca912f9f65015c8951.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_99e0d50d9f4543b68ec9577d59fca9c0.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_76f0ca8f83bc4465abfc843bd1c544bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bb67d7-cc4b-4fda-b463-f71c9f61a342/ruvazutovesow.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_9dc1940e6afc4e95bd0eb40280994598.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_27d845f8cbb747828f412f0a6205274c.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40A 5504 bytes
SHA-256: 4d7591a9e3617d358d605cb79c92fc557512081c8339fca514ff0e4c56ac4ede
font_01_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 6168 bytes
SHA-256: be917c0db7373273820b965e09a90eb2fe17fe2eb699b6f9fe1ec8b3b19cfce3
font_02_sfnt_off0001156f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156F 11104 bytes
SHA-256: 1ea43578f38d4bb5e985bacd5786d7799a0ce8a2840f5af904155c40ed3cc634