Malicious PDF — malware analysis report

Static analysis result for SHA-256 807668d81f4f58ec…

MALICIOUS

PDF

80.2 KB Created: 2021-03-05 06:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90288a1fba3a981259df844023738063 SHA-1: 11f8a40409153c68f84322af961c47ec9c136154 SHA-256: 807668d81f4f58ecc13940e384d0c153bcbd1d428358a3e92c3bad6c59162917
126 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs pointing to suspicious domains, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=pa+dmv+motorcycle+manual PDF link annotation
    • http://pazefezos.mywebcommunity.org/public_relations_specialist_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501989/normal_5fd1c49c985d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_60392d28dd447.pdfIn PDF document text
    • http://vabademajelid.iblogger.org/68007755890.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_602f4313f3f87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_60114b5a551b9.pdfIn PDF document text
    • http://konolux.medianewsonline.com/37418614021.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palowok.epizy.com/72772394034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a1e828-128d-4e79-aac6-f85254914aee/99114236061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a28d09-cd61-417d-a9e9-f085b15b28c7/jugepenazorizovu.pdfIn PDF document text
    • http://tusuzexuwijoki.rf.gd/97376360822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b4fa28-68d4-46a3-a89a-7c4cce1c27b0/92869216353.pdfIn PDF document text
    • http://mawigugu.rf.gd/beardo_trimmer_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9666dbe-4a7f-4c97-8a98-35179144ff88/jogipufopobaj.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/13074403385.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/xaxejokezegotajorabakurer.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 5072 bytes
SHA-256: 54cccaab6ae8388ef9a905a3263ab6ed28cb916a42460044add3bc1e3afc11ce
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 10612 bytes
SHA-256: 495231ddbf36e5b0316238839c05cd60e877652752cc9121355ab48dce220de0

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