Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdb4669b6fd4fce…

MALICIOUS

PDF

62.7 KB Created: 2021-03-01 08:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 77f635626ae5d9654bd7d93998e87995 SHA-1: abd63cc7cee8404ad489e84c5f297c66aef167cf SHA-256: ccdb4669b6fd4fce08fa03b480e3cbed85188668e91ed1ca7a6d0eaf490c5963
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing or malware distribution. The PDF's structure and embedded links suggest it functions as a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

Heuristics 4

  • 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
  • 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://vilenefex.ru/award?keyword=how+do+you+do+an+echocardiogram+on+a+dog PDF link annotation
    • http://dosaxixapaxa.medianewsonline.com/76877946015.pdfIn PDF document text
    • http://my-favshopf.online/5962432935r87ll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_600e6956ee914.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_6007027d11c62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fcbf196d1d00.pdfIn PDF document text
    • http://zivufomureko.22web.org/cooks_essentials_electric_pressure_cooker_model_99700_manual.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/is_it_too_late_to_plant_tomatoes_in_florida.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/47775147732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fodarevo.rf.gd/27686956083.pdfIn PDF document text
    • http://vosojeki.epizy.com/how_to_pronounce_american_english_words.pdfIn PDF document text
    • http://bezegorev.epizy.com/parineeta_assamese_serial_song_free.pdfIn PDF document text
    • http://zunebodiz.epizy.com/zudos.pdfIn PDF document text
    • http://jozivunawitud.rf.gd/math_kangaroo_2019_questions_and_answers.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/cant_help_falling_in_love_chords_guitar_easy.pdfIn PDF document text
    • http://pelubameta.epizy.com/getum.pdfIn PDF document text
    • http://zutawatupasexap.rf.gd/sirigafuromab.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 5296 bytes
SHA-256: d1460e138b5501592826f1df07565739c78cbaa904dc3aab8a3833daa8073eda

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