Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bde42230b257a4…

MALICIOUS

PDF

82.3 KB Created: 2021-04-23 23:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fcea853db51129feedb8e1d9390e0e5f SHA-1: 2702acf777c3fd236cfb8e680d61023795835835 SHA-256: f5bde42230b257a404e5a27be972cba98f75aff3dec2fa6748df46fd4421f4e5
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to a site that exploits them or serves further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/strik?utm_term=what+is+a+california+real+id+driver%2527s+license PDF link annotation
    • http://gixitetopes.scienceontheweb.net/gewadadebariwew.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/73146606166.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/campylobacter_jejuni_patogenia.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/albuterol_nebulizer_davis.pdfIn PDF document text
    • http://zanapipok.getenjoyment.net/fagotelawuvabexakakas.pdfIn PDF document text
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/lutareguzerodig.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/babutotowiluf.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/17724952769.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/08dda0afaf54.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/az_103_microsoft_azure_administrator.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/satyanarayana_biochemistry_file.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/xugisirusukeboxefirunujo.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/asperges_me_partition.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/xexebifesajajojetug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nemafu/rowdy_baby_mp4_video_free.pdfIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/40637164562.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/kumuwavixopemapus.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/xoporan.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/vuvufipekitusaku.pdfIn PDF document text
    • http://gajopule.myartsonline.com/30_successful_online_business_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/93645694067.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/bodmas_rule_practice_questions.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/how_do_you_pray_for_your_enemies.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_off0000fe57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE57 5216 bytes
SHA-256: 9dd2a9e02a9f2938f49c45d35407b7580d992a1102deca566f1b09a1428a7e21
font_01_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 13324 bytes
SHA-256: e49654893351828faea096acbb9efdde8faad74601575092c2ab52d829959adf

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