Malicious PDF — malware analysis report

Static analysis result for SHA-256 facefe3787309b26…

MALICIOUS

PDF

83.7 KB Created: 2021-03-21 04:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2a9b578d3493ecd2412bf5b24961872d SHA-1: 6bed4a7078b1bd6204a1082596bcf45e36a2d826 SHA-256: facefe3787309b269471a5296f073abfabbb1df36c6e72fc40dfee938dd42488
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within it. The primary URL, 'https://leonvi.ru/wix?keyword=mhfu+longsword+guide', suggests a lure to a potentially malicious or SEO-spam related site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=mhfu+longsword+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fe2969d42e73.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/qqhbCpX/32921483592.pdfIn PDF document text
    • https://waxusebodik.weebly.com/uploads/1/3/4/5/134529962/wupasase_zoduguveb_xusezowiriged.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/mabagote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5fe626cbd7cf8.pdfIn PDF document text
    • https://befinutu.weebly.com/uploads/1/3/5/9/135971501/favix_mokanigirut_kulaladerokutap_pogelagu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450884/normal_5febeb490a58e.pdfIn PDF document text
    • https://sojetupeduxagi.weebly.com/uploads/1/3/1/8/131856567/0e3e9d4e0f61a2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5ff46a5a49c76.pdfIn PDF document text
    • https://fexasesari.weebly.com/uploads/1/3/1/0/131070539/joxujin_rapikavem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://02274cc9-8b57-4441-be19-e46c089ec46b.filesusr.com/ugd/f11b8f_a60e81d5b8924e9aa065aa29e24e6745.pdf?index=trueIn PDF document text
    • https://18cceff7-6d50-42ec-9d85-67184b61345e.filesusr.com/ugd/8c2e83_25c629e97d884119ad3bec261316b994.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_f9478e2b6040407d86b0cd1d144f9c16.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_fa5e046ac56046dfb30a2ae0dec8b0bc.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_4e5c6723843847eebabe6ce379ed99b4.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_f6e6d33d4f974ee5ae639f2ba12e3ecf.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_off0000fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 3472 bytes
SHA-256: 66d27a17c0ae8dfea87070860b9daccfbf83624262c57a8d53fea64b537f00da
font_01_sfnt_off00010a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 5056 bytes
SHA-256: 0b322874fa0cdd62dd63b30e9b7e3765ca02abc8c9aa910cf18bec6c518025dc
font_02_sfnt_off00011bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 11152 bytes
SHA-256: dc8b720b31d9bfb4ad06b326057129310803d9f2286e44aa100fe205ae9bdb50

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