Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7f33367cd7ed02…

MALICIOUS

PDF

72.9 KB Created: 2021-02-01 18:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 92dd9e4f0504d5cfbeeac010addd239f SHA-1: 9f15dc6743f88065ddac193f0899ac81206aaa70 SHA-256: 8e7f33367cd7ed027e7eccd5d700a6bae7132d33ad70a0d72d14cb6cdcbfb898
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a prominent one pointing to 'maypoin.ru', suggesting a phishing or malware distribution lure. The presence of multiple links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=blackmart+latest+apk+2020 PDF link annotation
    • http://tegogigagozij.iblogger.org/new_company_name_list.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/ic0Dfid/vexomusugabujejid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_5fd183bec8786.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417122/normal_5fcf679f2f246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417408/normal_5fe18dbfee495.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/pevawituxasi.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/lelukupabixidilodope.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/f2258904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_60129c7875c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fdb8d2636e72.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/tgfjga7/tumalapanesojojanovovivej.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/7049016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373987/normal_5fee2a0ede6af.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/7995871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_5fd7dbe60332b.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/sikevajivabov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_5fca6bcf83ffc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekumituvi.epizy.com/blood_type_codominance_and_multiple_alleles_answers.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5468 bytes
SHA-256: 68a86d11602b94060ee197c63792c6a1cf85ae4c3da7c22e32aad0ae2f7ebe64
font_01_sfnt_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 10468 bytes
SHA-256: f74da738912e6bb56c7f1197a3b8e6747253a289756e1cdef8e9eac3435bea40

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