Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4b676f92c215a2…

MALICIOUS

PDF

64.0 KB Created: 2021-03-23 02:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 555771166bf33c98ef4d87c68048e269 SHA-1: a7e0e10eca47e9414b7f58817fc29262259f16e4 SHA-256: 0c4b676f92c215a28156ecb816e5b331cd67add8a93d323c512b095f68306667
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to suspicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9473

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mezovuduw.ru/award?keyword=%25C3%25BCbungen+br%25C3%25BCche+pdf
    • https://static.s123-cdn-static.com/uploads/4405904/normal_6006bee92beb5.pdf
    • http://sesalon.xyz/69056524578t9z76.pdf
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/83261c.pdf
    • https://cdn.sqhk.co/lepagesali/icjeEii/4_pics_1_word_5_letters_cards_mountain.pdf
    • http://liolika-rsya.ru/4932994180g5sfb.pdf
    • https://cdn.sqhk.co/pumafuki/hfggbgc/car_diagnostic_pro_obd2_enhanced.pdf
    • https://cdn.sqhk.co/wirowanorax/hjicBjd/jurassic_minecraft_server.pdf
    • http://mangalvpodarok.ru/votaruxifezidjen1a.pdf
    • https://xumijarivibamow.weebly.com/uploads/1/3/5/3/135339210/buwadafewevikevegim.pdf
    • https://cdn.sqhk.co/ziloteduxemo/4gdgc4y/fagowirilobiwuzelazipek.pdf
    • https://cdn.sqhk.co/temejikowewa/ahgzhgk/star_wars_movies_timeline.pdf
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/rozadigajur-dorexegatiwus-gofekured.pdf
    • https://static.s123-cdn-static.com/uploads/4415068/normal_5fe3afe41babe.pdf
    • https://cdn-cms.f-static.net/uploads/4369191/normal_60362adf400a8.pdf
    • https://babidunilatejob.weebly.com/uploads/1/3/4/2/134266015/puvalepiwujix.pdf
    • http://in-step.shop/fiwebowofazezkl7u8.pdf
    • http://all-casino.xyz/8144993092163ank.pdf
    • http://securityofusersdevicesonline.site/gavipud3iyg.pdf
    • http://gonzo-3d.com/what_does_it_mean_to_be_called_by_god_into_ministryj6xw6.pdf
    • http://rubeatyshop.xyz/dikafikl80d4.pdf
    • https://cdn.sqhk.co/buvaboda/ghcEPij/the_office_quiz_questions_and_answers.pdf
    • https://cdn.sqhk.co/zagakobafot/Pjjie0P/zombieland_cast_disney.pdf
    • https://cdn-cms.f-static.net/uploads/4406820/normal_603d5c0597587.pdf
    • http://avtoshtorki.shop/samsung_grand_prime_price_in_kenya_2018bvk2n.pdf
    • https://cdn.sqhk.co/tirazirevemu/hi0yjhE/w3schools_html_form_input_types.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b6.bin
927d0ada4bd94e6c73b04be949bcd0b9f2c440095adf4d7dff5be457e6b3b4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 5272 bytes