Malicious PDF — malware analysis report

Static analysis result for SHA-256 013e1b1a80fb4acd…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 20:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 957b0f3094762868fb15cae4ee21308f SHA-1: 8f756914b40fb1a1f8efae02a531673a32c2407b SHA-256: 013e1b1a80fb4acd680cc6a1d0e1ca95fedb12365f80f23f4df852334d4cfe0f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 6

  • 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 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://fokemale.ru/wix?keyword=ff14+paladin+guide PDF link annotation
    • https://nudezodubazez.weebly.com/uploads/1/3/1/1/131164524/fasawurojab.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/dapupuj.pdfIn PDF document text
    • https://jaxefosizi.weebly.com/uploads/1/3/6/0/136083017/5193313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_603955b15b10e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427526/normal_5feb4cc006284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455642/normal_5fcaa6060fc17.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/7731055.pdfIn PDF document text
    • https://guwasevotimonu.weebly.com/uploads/1/3/2/7/132741081/3566154.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_e0b1d6befd22437d8dd8acd12d2fa800.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9506bd2-69a5-4a48-8922-d550964472c2/zulimozebogakorusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05864902-5957-463d-b194-0c05bc89c865/absalom_absalom_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/mugirarisewesaxigolap.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_c3c39237d60e417fb8b3ff494127e542.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desenaz/document_de_cession_de_vhicule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f29108b2-35b2-4478-baeb-b1fa6b581de8/37119185369.pdfIn PDF document text
    • http://vabepevid.epizy.com/instagram_logo_font_free.pdfIn PDF document text
    • http://nosodete.epizy.com/pointage_antenne_canal_plus_afrique.pdfIn PDF document text
    • http://mimumugemefes.epizy.com/filuwesubudivun.pdfIn PDF document text
    • http://zelobiliteriwe.rf.gd/23307900745.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_654bb9e0d2db4e0489f193d901569a4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36510c50-d66b-4f59-8db4-48a2813ace1d/number_theory_david_m_burton_solutions.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_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5032 bytes
SHA-256: ace1190a57d42222f101ec9be2894f79032f59a909dbb906967f007ed92d094d
font_01_sfnt_off00010ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE0 11300 bytes
SHA-256: 503bde3f98fdddb99aa7638eb8b9bf9a8a2ea057d1628531f194e8e1b5b682fe

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