Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd297547bc96f4c…

MALICIOUS

PDF

82.6 KB Created: 2021-04-11 09:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 764acc39a479ca47be2e400aecd65a9c SHA-1: e490efe07a8616fcf4e082c2cfdb5410c885b66b SHA-256: efd297547bc96f4c8513fd82c70bae3010dc4a52815a075b94d934aa722a6e13
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6680

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 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
  • 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://baarspo.ru/strik?utm_term=behringer+xenyx+x2442usb+driver+mac PDF link annotation
    • https://cdn.sqhk.co/mugejufunij/hTFgdaX/56917557982.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/cifPgjO/desktop_tower_defense.pdfIn PDF document text
    • https://dapobatajixafaw.weebly.com/uploads/1/3/4/3/134310280/xepelowutimi.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/jEUhIPI/download_aqualife_3d_unlimited_money.pdfIn PDF document text
    • https://rezedutusijilik.weebly.com/uploads/1/3/2/7/132710703/kubafudova-nunumobuserufe-pejimezibi.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/RgeWWYK/15617673989.pdfIn PDF document text
    • https://noparageselex.weebly.com/uploads/1/3/1/8/131856757/fd1a5998c3.pdfIn PDF document text
    • http://tryadasert.online/how_to_type_cubed_on_macd83mz.pdfIn PDF document text
    • http://yoga-fitness.space/87219041687wjzfd.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/E2Widje/jump_on_it_utah_locations.pdfIn PDF document text
    • http://freud.icu/hideo_kojima_game_death_strandingnfs9y.pdfIn PDF document text
    • https://cdn.sqhk.co/mowamukar/mJILNc5/27733399152.pdfIn PDF document text
    • http://idealicait.website/king_james_version_apocrypha_download2uq75.pdfIn PDF document text
    • http://adanakebap.org/niwetusejunomesibexufj73y9.pdfIn PDF document text
    • http://probmaka.tech/33231744961x5osd.pdfIn PDF document text
    • http://milansit.space/gexilieh9j.pdfIn PDF document text
    • http://trokot-roznica.xyz/49743761874ggyz6.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/11321816599j88pd.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/iiobMx5/55108712645.pdfIn PDF document text
    • http://merishwheelrecords.com/40859468139eqf0q.pdfIn PDF document text
    • https://cdn.sqhk.co/jiledexuda/ghagcEZ/23263564188.pdfIn PDF document text
    • http://prizinsta365.site/yamaha_natural_sound_av_receiver_rx_v473_manualw17av.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/2jgXmji/41328258792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000128a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A1 5960 bytes
SHA-256: 422a86a54512dfd716be3c58119a816b32d5ad1b61d92e1030a9c3afc5bdb37a

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