Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eced7539e0836a…

MALICIOUS

PDF

82.3 KB Created: 2021-03-20 12:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: abd8df13838c71e0e10f40476597f732 SHA-1: 42add6069740f09a3dd65f5871e4ce5c7df73a6a SHA-256: 65eced7539e0836a2a88b297357971b1e89c736eea90f90ee075e003d4076ce1
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious content, 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 for phishing or distributing further malware. The embedded URLs and the document's structure suggest it's designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/wix?keyword=certificate+of+origin+for+a+vehicle+vs+title PDF link annotation
    • http://wownatural.fun/30940887401957xa.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/ributebif.pdfIn PDF document text
    • http://yewes.fun/technical_english_syllabusgevvu.pdfIn PDF document text
    • http://hackins.site/sudotasegepovajurapapipz1m5v.pdfIn PDF document text
    • http://expressday.online/telapazomukorewuka5nza3.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/tamil_novels_free_download_blogspot.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/godadumifivutaz.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/tirunukigadelafo.pdfIn PDF document text
    • https://tudepaweper.weebly.com/uploads/1/3/4/6/134607512/6378876.pdfIn PDF document text
    • https://lavafijaxeb.weebly.com/uploads/1/3/0/7/130740432/c58d94126.pdfIn PDF document text
    • http://national-verifyteam.com/zobegosipevenefp4mus.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/bienestar_definicion.pdfIn PDF document text
    • https://vajejiwad.weebly.com/uploads/1/3/5/2/135294738/5491010.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/dd_unearthed_arcana_spells.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/1750585.pdfIn PDF document text
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/mufizul_kisogizivige_wixike_nasejezu.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://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_d7e92de307774a49be1815b2c0f7b5f9.pdf?index=trueIn PDF document text
    • https://56352102-112a-4456-a677-0775450c4ed3.filesusr.com/ugd/ed4e87_d68a691cb5bd4f4fa536d21a341e72a8.pdf?index=trueIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_413089f6e1ba490e8b2e2ae1bf280373.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupijila/xabasonugadewiwuduguje.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/wemomotojomo.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_7b1ed2ed034c40bf932fcf6f0cffe90a.pdf?index=trueIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/what_does_ethical_hacker_mean.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_13142058ff4f40ffb701749444de1066.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/77609133465.pdfIn 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_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 5012 bytes
SHA-256: f761e46ccef9bcef8c751857d557e157b25ce05c0dcf8abe358a301e93395f65
font_01_sfnt_off0001030c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 11884 bytes
SHA-256: d9182b4d58c20c71fef2aadb78d5b921ebe0c67ebb1bb3ce3f5facce74681746
font_02_sfnt_off00012b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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