Malicious PDF — malware analysis report

Static analysis result for SHA-256 936d25068e0df507…

MALICIOUS

PDF

85.5 KB Created: 2021-03-18 03:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 948cc410fc2dd3c996b3c90b82b0614b SHA-1: 65107e71090e32415706b225c2c175f6da539d8e SHA-256: 936d25068e0df507f9a362a00682ca78f425ec0d6f246a4e14be26660e7757ed
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to 'Those who walk away from omelas' to entice users. It contains a high number of embedded links pointing to various domains, many of which are identified as disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=those+who+walk+away+from+omelas+summary PDF link annotation
    • http://abistrans.ru/43208620131rbmu4.pdfIn PDF document text
    • http://retys.fun/radical_forgiveness_worksheet_instructionshdwc3.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/5083312.pdfIn PDF document text
    • http://bloodcraft.online/tawuwelosegixox6fuhi.pdfIn PDF document text
    • http://creditinquiry.info/3-year-old_milestones_gifted208is.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446643/normal_5fca2cc57026d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_6020d2a60cf3f.pdfIn PDF document text
    • https://lunokebu.weebly.com/uploads/1/3/4/6/134648327/mevavefu.pdfIn PDF document text
    • http://familyit.info/jojulakewmves.pdfIn PDF document text
    • http://koteyarn.moscow/ti-84_plus_ce_programs_physics9mifk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_603701d8b5a27.pdfIn PDF document text
    • https://piluzixalevuj.weebly.com/uploads/1/3/5/3/135345731/4046275.pdfIn PDF document text
    • http://rimiripa.mypressonline.com/worship_piano_chords.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/microsoft_office_for_mac_catalina_crack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_6006cc8c9c292.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/wuwibawusovesosofofa.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/poxegotosekerafaxakop.pdfIn PDF document text
    • https://fogolaliri.weebly.com/uploads/1/3/2/8/132814342/47111b911e4d5.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/50_idioms_and_phrases_with_meanings_and_examples.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/40619196514.pdfIn PDF document text
    • http://tepominofujemo.atwebpages.com/arteri_perifer.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/philips_respironics_remstar_auto_a-flex_cpap_machine.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/72635940545.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/onan_7.5_hdkaj_service_manual.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_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 5216 bytes
SHA-256: 6ab1e7ccec5d0b9ee9dbc119805f7171c2ee8b9fbddc5b2e32b804da095473a6
font_01_sfnt_off000122a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 10668 bytes
SHA-256: a9bcbd24dd5cfad5235b4c7f0d4273f3fdabaad0da71655d8ec2df2a6a6b7c3a

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