Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e8507fce90d1fd…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 09:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e70a138201e2c6f1a1fc0e633473834 SHA-1: c349fa64845a3c219a26bb834646b469db221a3a SHA-256: 02e8507fce90d1fdbe41b49dccf5cb9d7ba754d6c1266325cf66ca7bfe3368f3
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/wix?keyword=sniper+3d+assassin+hack PDF link annotation
    • http://gixipures.sportsontheweb.net/examples_of_gram_positive_and_gram_negative_bacteria.pdfIn PDF document text
    • http://mixed-rootwork.com/inama_by_diamond_audioslu3w.pdfIn PDF document text
    • https://wesaxewotivaf.weebly.com/uploads/1/3/4/5/134578523/vexanoxiza.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/warhammer_2ed_bestiariusz_starego_wiata.pdfIn PDF document text
    • http://sfr-webmail.com/voxajorojezojowadogabupta.pdfIn PDF document text
    • http://nnorm-id.com/shoot_bubble_deluxe_pc94cwq.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/2792b.pdfIn PDF document text
    • http://webdefilmizle.com/why_are_mr_and_mrs_number_so_happy_wbmhbo.pdfIn PDF document text
    • http://kraftmann.su/68280570283w52ss.pdfIn PDF document text
    • http://persequen.com/nebagozr1jxc.pdfIn PDF document text
    • http://axacheat4.xyz/salems_lot_remake_2019iwrip.pdfIn PDF document text
    • http://new-volosi.ru/62456296377w61vh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_c1e4e09177f345ef8faa252f93c5bf71.pdf?index=trueIn PDF document text
    • http://povovudajax.rf.gd/cardiomyopathie_hypertrophique_obstructive.pdfIn PDF document text
    • https://09d56968-2ae9-412d-ad86-e67dc63a1c23.filesusr.com/ugd/e8b91f_1e9ac376604540bca2357dd7aadceac7.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_c1537ec08a0843e18b0b6c4b1912a5d3.pdf?index=trueIn PDF document text
    • http://tewegaza.epizy.com/fundamentals_of_civil_engineering_book.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_0638668c4f9e417db4b1c279bc9fe703.pdf?index=trueIn PDF document text
    • http://xotaferuju.myartsonline.com/8226658843.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_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 5460 bytes
SHA-256: fe438faad50a2be8459a57374d376d40779b5f3f10753063322d1d26e3cfd38f
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 22528 bytes
SHA-256: b586be27bf23aec11e0edf06d00c620f91ac50a60733a2a4d33e0880e086f530

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