Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc227efa8979d88b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-29 07:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f68afd1110a444b52ecf9be49ee2641 SHA-1: 287388557d1fc0a646a8fbe726d47af9b75723c1 SHA-256: cc227efa8979d88b3c2107a782ec5fbb57eade3f46308025e5568f8e9ec727da
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, embedding numerous external links, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

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://xezojetit.ru/strik?utm_term=the+adventures+of+sherlock+holmes+the+dying+detective+cast PDF link annotation
    • https://vebiponexuxewi.weebly.com/uploads/1/3/4/7/134758887/5396998.pdfIn PDF document text
    • http://lixusopo.mywebcommunity.org/75035999816.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/descargar_cancionero_infantil.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/jomugavoraje.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/3172660.pdfIn PDF document text
    • http://jewagep.22web.org/what_is_a_good_wine_pairing_with_lamb_chops.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/mathrubhumi_calendar_september_2020.pdfIn PDF document text
    • https://mofuxobilewita.weebly.com/uploads/1/3/5/4/135400762/aeb36b023.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/energia_hidraulica_en_colombia.pdfIn PDF document text
    • http://lulodexov.scienceontheweb.net/my_bloody_life_audiobook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_6263401bcdf340f3a65f240d1d689fc9.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_ba49b84eab234937a1450e3530b28b00.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_ba01bf1af53b483495e2d4745655717b.pdf?index=trueIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_57a3d9113ed34581bbe1e0cd119c7565.pdf?index=trueIn PDF document text
    • http://disobaratid.rf.gd/48037826078.pdfIn PDF document text
    • http://desuvusemexemob.epizy.com/genajalifopigapobaji.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_9850187bd77640c7896a3a97a36f9c8d.pdf?index=trueIn PDF document text
    • http://milebulijulami.onlinewebshop.net/zufizunid.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/35141206770.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_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 5608 bytes
SHA-256: 10501b55aed3c646a4c684b4154f16ab2efaf27da85f4e69432aa60176129cb3
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 12884 bytes
SHA-256: fec881c3d05984a98fe0f83f1576dd6552945d275008710a826e58e43f4c2534

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