Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8aba017bb5b11b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 08:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4a5d0fcd1f86e0f52d7fb3dc877496a5 SHA-1: 5c3571efa136548e92868dd7ad1834c6fffbebc6 SHA-256: 0e8aba017bb5b11b24626282be4142f3f1d48fb45101c26819d873005431c74c
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML classification strongly support a phishing or malware distribution attack pattern.

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://ponafet.ru/wix?keyword=mshsl+speech+discussion+outline+2020 PDF link annotation
    • http://gepokupaburorew.mywebcommunity.org/3m_safety_products_catalogue.pdfIn PDF document text
    • http://tobaliwono.mygamesonline.org/auction_theory_krishna.pdfIn PDF document text
    • http://mareson.getenjoyment.net/automobile_engineering_technician.pdfIn PDF document text
    • http://dakavol.22web.org/bukutumus.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/71741531531.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/52741493588.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/when_will_the_next_wings_of_fire_book_14_come_out.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_603795fe4d684.pdfIn PDF document text
    • http://rezumitisud.mygamesonline.org/22229319190.pdfIn PDF document text
    • http://pigozolifafaw.iblogger.org/32959956770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_600e5acf21ac8.pdfIn PDF document text
    • http://muvariwiporiju.iblogger.org/uitzending_bijwonen_formule_1_cafe.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/lokaxolit.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
    • http://dijipola.onlinewebshop.net/23901946904.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/the_boy_in_the_striped_pajamas_trailer_in_spanish.pdfIn PDF document text
    • http://zepedijuva.epizy.com/free_english_grammar_worksheet_for_grade_3.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_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 5016 bytes
SHA-256: fa4df3ca1c86521450edf2449be2b74556b8bd19886562f07af97375dda8bbf4
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 11452 bytes
SHA-256: 51c882640c073806cb2571e0fcc93d9eff230da849d598cd27c44fdbe24a8d9a
font_02_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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