Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff382cffada808d5…

MALICIOUS

PDF

70.6 KB Created: 2021-03-01 08:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 90d988ea2701fb8e74697915bced3476 SHA-1: 7b7bcb11b441d8279e8ebd57c6c31c60fc581b98 SHA-256: ff382cffada808d550376abbbad9092f846e00ad513083cfa753383ddc43199b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristics suggest it functions as a link farm on disposable hosting, likely leading to phishing or malware. The presence of urgency and callback lures further supports a phishing or scam pretext. No scripts were extracted, but the PDF structure itself is indicative of exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=drinkwell+mini+pet+fountain+replacement+pump PDF link annotation
    • http://goworudubilit.iblogger.org/ct_lower_limb_angiography_report_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452626/normal_60283f8e56a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_6010c4e8ab4fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5fee1c7050e8e.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/dQt0aby/car_speed_sound_ringtone_download.pdfIn PDF document text
    • http://penibibujobufux.iblogger.org/fepamibeve.pdfIn PDF document text
    • http://rugavup.iblogger.org/11192188340.pdfIn PDF document text
    • http://my-favshoph.online/witefeguweuz41g.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/97142288911.pdfIn PDF document text
    • http://nicepics.xyz/2012_toyota_highlander_limited_headlight_bulb_replacementjalef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_602b26ac81199.pdfIn PDF document text
    • http://jubigorut.iblogger.org/a_song_of_fire_and_ice_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevidimifab.epizy.com/wugituvijal.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/10_key_kalimba_sheet_music.pdfIn PDF document text
    • http://wexugemo.epizy.com/99196254454.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/64688565782.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/pre_engineering_building_design.pdfIn PDF document text
    • http://fexojuvaf.rf.gd/40863713199.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/ios_xe_ipsec_configuration_guide.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_off0000d2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D5 5136 bytes
SHA-256: e68ec42b379b388ff1b7f6d3b010090ff2067d864ed2bcb96fffc1143e07633b
font_01_sfnt_off0000e453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 11636 bytes
SHA-256: 63df8a4a0a282db21e6b93b6826bfd231705e4431647acb7ab63a73e7b3d5219

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