Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5a8f24bee1b9c5…

MALICIOUS

PDF

76.3 KB Created: 2021-02-25 18:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7bb2fb1aa83b974f689637ac7837fde1 SHA-1: 7f3ba8a441bd022bb29aeaa84c1c187ed7bae3de SHA-256: ca5a8f24bee1b9c5cdc3199416ffd6c5241283dea626b4ee1e13038a626ae571
182 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though partially corrupted, includes a question about a whirlpool washer, likely a lure to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8823

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=why+does+my+whirlpool+washer+not+start In PDF document text
    • https://cdn.sqhk.co/sujubowip/aWggOlQ/86957233774.pdfIn PDF document text
    • http://fishing-rods2.club/free_rock_n_roll_music_ringtonesuv98f.pdfIn PDF document text
    • https://furogareb.weebly.com/uploads/1/3/1/3/131397930/2194b39b542.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/j9geiaP/nova_launcher_apk_download_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/bexikerez/QrfPie2/xubetigaduxalirogem.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/dihiDif/shark_attack_world_map.pdfIn PDF document text
    • http://whitetwo.space/victoria_secret_angel_credit_card_customer_service_numberw6rq1.pdfIn PDF document text
    • http://verifybadgehelp.com/no_one_left_to_lie_to_audiobooklq8xe.pdfIn PDF document text
    • https://somusepuxe.weebly.com/uploads/1/3/1/0/131070447/jixawegosolel_xudafopaxas.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/majetefal.pdfIn PDF document text
    • http://vvinorama.website/16526274469wzpw1.pdfIn PDF document text
    • https://kevotimobamos.weebly.com/uploads/1/3/1/6/131636762/pebamoxakotupafubuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ghhdTki/kubusevez.pdfIn PDF document text
    • http://kernig.store/jetilabusihueb1.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/gagotaniwipure/bowmaker_golf_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/michelin_guide_tokyo_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/wifenukerezopiteged.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/hyperuricemia_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/23186881541.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/21153645639.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B38 5196 bytes
SHA-256: c1d92f9d7b1d605e4cae84d93b055e1bfe4416d965458bf2032a876f151b82d7

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