Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e66ef42d620068…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 23:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 06cb00abdf0c21d9f11df68dca5b3a62 SHA-1: a026339cc58fdb5d40cdfa55085eac761b31a14e SHA-256: b6e66ef42d620068be17ecab4e08055fbaccd011ee350bdf8acc92216dd4d3b1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL 'https://jumiwimov.ru/strik?utm_term=what+risks+with+high+blood+pressure' is likely the primary lure, directing users to a potentially malicious site. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=what+risks+with+high+blood+pressure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fdc34340e653.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/SEra8Bl/godaddy_view_login_history.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/tatatujew.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/jilazesapepixikej.pdfIn PDF document text
    • https://texifuxifom.weebly.com/uploads/1/3/0/7/130776695/xekukijugabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469641/normal_6040f087c5b61.pdfIn PDF document text
    • https://jafumatelitu.weebly.com/uploads/1/3/4/8/134884178/mutukulopele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_603d4db581965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6017a56d8c0c9.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/YShegfP/pure_flix_trial_period.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5ff4c7e341b7e.pdfIn PDF document text
    • https://cdn.sqhk.co/salusasopuvi/8MYjegh/necromancer_definition_biology.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/3407018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawokale.myartsonline.com/identifying_similar_triangles_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0da6735-be63-4952-ae2e-49d88656b874/mesapoju.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/ameloblastoma_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378d2b5d-395a-4941-ad33-dfe764f91a5b/does_starbucks_pay_every_week.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a95e649-6298-47b7-9052-e53c36706217/how_to_change_blade_on_skilsaw_5400.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/cardinal_utility_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45aa03d8-9aa5-4ce5-a496-e857fac5d294/a_matter_of_days_resolving_a_creation_controversy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1105fa10-c4f0-4e5e-88af-9c3f9e2e74fc/90985833671.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/68438568856.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_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 5528 bytes
SHA-256: 6603db8140bcf62867c515c30378d480f6f18ab2c7d195bdbde8e62e57f74ce9
font_01_sfnt_off00010024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10024 10604 bytes
SHA-256: affb7cd122656834e30ab64bc03b8acbe550831e54b21001ed230322c1fdfcc0