Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f23bb89c24dcd0e…

MALICIOUS

PDF

60.9 KB Created: 2021-06-14 00:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 75abf8372525753ba3832ccfbe646a28 SHA-1: 8561f91efc6ea48860a32fd65b2abbaf35676234 SHA-256: 2f23bb89c24dcd0e92dd993474d56756494d5ad620327689c314fa14e158d984
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with a critical ClamAV detection for Pdf.Phishing.Trojan, indicates a malicious intent. The primary goal appears to be directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6876

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://crysiq.ru/pbw?utm_term=pulse+amplitude+modulation+pdf PDF link annotation
    • https://bipasomuted.weebly.com/uploads/1/3/6/0/136010989/1e1dd.pdfIn PDF document text
    • https://fosakozetabu.weebly.com/uploads/1/3/1/4/131483491/fumavime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_60b817f9ccb42.pdfIn PDF document text
    • https://zujetopefij.weebly.com/uploads/1/3/4/7/134766602/4913330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_603a9e43cf6ed.pdfIn PDF document text
    • https://vawalebadafi.weebly.com/uploads/1/3/4/6/134660315/038c3f4e6.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/rigowozuv_dalovamil_dowijojejovur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_604bab1e1363a.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/bilaxane.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/d7209e2a904c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144630351/how_to_find_kanais_cube.pdfIn PDF document text
    • http://xolajaz.pbworks.com/w/file/fetch/144767541/mobile_legends_skin_hack_2021_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a43197-9f10-47e0-98dd-3e4b70f1b56e/nutritional_information_taco_bell_refried_beans.pdfIn PDF document text
    • http://nixefijevumu.pbworks.com/w/file/fetch/144688740/61323769901.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144930141/wovejokimigijojefuzoviz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1342ad73-b9ed-4562-b094-ede87730b555/on_my_honor.pdfIn PDF document text
    • http://tazijebep.pbworks.com/w/file/fetch/144562089/why_does_my_dyson_dc16_keeps_cutting_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c6cc9b-9409-4cb3-8002-6472ecf54d70/how_to_set_citizen_eco_drive_gn-4w-s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53de2609-1445-4d82-a016-64f4bf43fbf7/charge_du_condensateur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dfd120-0c8b-41b2-9ec5-988a51c3877f/how_to_play_croquet_for_beginners.pdfIn PDF document text
    • http://xereledo.pbworks.com/f/60421519674.pdfIn PDF document text
    • http://nugewil.pbworks.com/f/why_does_the_standby_light_on_my_hitachi_tv_flash.pdfIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144426531/17130423715.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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5092 bytes
SHA-256: 9178dc03e72f830d83e92797f113f7e97e9cfa49b9f2a0d60cadf7da0727ee86

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