Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1ce8e97fdd3d28…

MALICIOUS

PDF

80.3 KB Created: 2021-04-06 13:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 67fadd674b3dd37f1e00c8d325028480 SHA-1: 7f17402673341adcd3cc579a1b34571aea253e75 SHA-256: 3e1ce8e97fdd3d28f31640e16b93c82f20447956410ca6929445838f6180576b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. The primary URLs identified are "https://xezojetit.ru/strik?utm_term=ranger+comanche+boat+seats" and "http://boguzimaro.getenjoyment.net/doreruro.pdf".

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=ranger+comanche+boat+seats PDF link annotation
    • http://boguzimaro.getenjoyment.net/doreruro.pdfIn PDF document text
    • https://cdn.sqhk.co/pobopuwubox/xjaifjg/hurst_competition_plus_shifter_identification.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_5fdc6dd55b613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_6058b44131341.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/QifghtH/19821231393.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/9624259703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_604a60579f478.pdfIn PDF document text
    • http://fajufoturesu.sportsontheweb.net/nuzusagazadadakukalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a49a6154-edc8-4132-95a2-c7bb8d673fe9.filesusr.com/ugd/551169_dd92569cb90a4f078b7615c548a457d6.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_8049f6873a3a45d09a6fdb6ca480054a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/852a6f00-d2da-4827-a20c-5c6d9e57608c/mojuxu.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_570d1d2841e14335b280a6cfa558611e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/711e7442-5ebc-48c8-a7f2-327ce5e69469/the_conference_of_the_birds_book_review.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/the_monkey_king_2_release_date_in_india_in_hindi.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_4fef588a11c84ba9b942ba8aed1e778b.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_494eda73cba042afaa211758e31f5123.pdf?index=trueIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_212ee77395944f04b7b79014a0e08c85.pdf?index=trueIn PDF document text
    • https://a96990da-dd17-4b11-844c-aba2d588d1b6.filesusr.com/ugd/5e5e7b_5f59e33986c54ba28339f328d6a23e08.pdf?index=trueIn PDF document text
    • http://tirigofov.atwebpages.com/66429857300.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_b28e08beb87b4d1d9fc410e85e22d0e3.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_42f0a4d4a32f4037b1cc6364d7d39dbb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c71fad0-7d33-49cc-b970-ed9c67926fec/89165901004.pdfIn PDF document text
    • https://7043ee2c-bc2d-4d46-b82c-b0075177c1aa.filesusr.com/ugd/f862b5_5aafcf7989674f87b3af778103710140.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_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 5328 bytes
SHA-256: 6a3fae7b1e32cef29e66a47f9e1359bb8690d91a68782039b10e923e57d7683e
font_01_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 11716 bytes
SHA-256: a675a54747662ec9e1103f73e5aa8726129d749e0daa00d8fbc33dc1961cd51b