Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2b079201e3e8ac…

MALICIOUS

PDF

96.8 KB Created: 2021-03-03 08:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5ed102b5e238e98f22c352c235f8fae9 SHA-1: 3a9d33a5ce1d19f9c80040d4a834f223588401b5 SHA-256: ca2b079201e3e8ac9b2830fc60444b77067d98182c3e49f95c6252c94f1d41ea
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'ML_NYX_PDF_MALICIOUS' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=locker+codes+2k19+that+never+expire PDF link annotation
    • https://cdn.sqhk.co/lebogomatoze/jdigZ4o/parkour_training_centre_near_me.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/34699459368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420434/normal_6035787ebb972.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/weight_watchers_scales_manual_ww710a.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/bojuneg.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/haWgjxR/10439903809.pdfIn PDF document text
    • https://dobopekajami.weebly.com/uploads/1/3/4/3/134314215/85d9bec4ae.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/46238022979.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/ipad_mini_2021_refresh.pdfIn PDF document text
    • https://cdn.sqhk.co/tugadeboda/oibhjPw/ketojijaximitizol.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/Taqgdgh/red_panda_population_2020.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/kisigemabus.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/minotivel.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/jaxutebifoga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5ff9264cced15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_60265d74e4b3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fanalejowegop.atwebpages.com/how_to_choose_dental_implant_specialist.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/98905440764.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/what_are_the_seven_rivers_in_africa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 5600 bytes
SHA-256: cb1343d2e23a2992a48840b8f55c0b90943df0c3f4590643c7cb7cda1696335c
font_01_sfnt_off00012fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 15940 bytes
SHA-256: da0584c51dc9696a5362161ed0f2cf195574bdf83931b8dd32b6bef049970119
font_02_sfnt_off00016126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16126 16064 bytes
SHA-256: 6159f348e0e6e748d0d688ad101778d659c126a663ff5cacd6c79928b4a0695a

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