Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e4a455fcee7bb0…

MALICIOUS

PDF

74.0 KB Created: 2021-03-21 22:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d115ddf5b804bb293e8ec4e7a8581ba9 SHA-1: f16851f1b19a6f71966659f60b95d760b7649f64 SHA-256: f2e4a455fcee7bb00cab277621fbcfcf924cbef243d4c821ce9abf09bc047c4a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URL points to a site offering a modified application, suggesting a phishing or malware distribution lure. The document body, though truncated, contains keywords related to the URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=penguin+isle+mod+apk+unlimited+money PDF link annotation
    • https://seronenufides.weebly.com/uploads/1/3/1/4/131407086/13f443b.pdfIn PDF document text
    • http://shopsupergood.site/56649999773xxra9.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/what_not_to_eat_to_get_in_shape.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/16751767556.pdfIn PDF document text
    • http://rubeatyshop.xyz/361379641519bpwn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_5fd628ec6b42c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5ff68bf53b15d.pdfIn PDF document text
    • https://kekoluborefox.weebly.com/uploads/1/3/5/3/135327445/6849666.pdfIn PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/668647b78dfb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470222/normal_6046901933053.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/qasida_burda_sharif_urdu_translation.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/analog_and_digital_communication_roden.pdfIn PDF document text
    • http://redit.fun/aoa_full_form_in_societykxd70.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/pibajuwi/petogamodatusukafuxof.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/charters_school_sixth_form.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/85429135611.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/what_choke_does_a_browning_a5_use.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/geotechnical_engineering_principles_and_practices_2nd_edition_free_download.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_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 5348 bytes
SHA-256: f3c3d19e35e2bb4df7b7a9e30a6aafd78c6a7315027a507b447101e4b0e5a9d9
font_01_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 11176 bytes
SHA-256: 2da2c0e2fdaff5419b6e856786629c056e328c5b95f1dfe5fe6e650e8a482bfd

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