Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3fbce5957d1e1f…

MALICIOUS

PDF

70.7 KB Created: 2021-06-01 05:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b4f9e9a7e531c9f77703494b098b27de SHA-1: 8763f843b6aa5600b8af4618aed35b39afca1929 SHA-256: fc3fbce5957d1e1f38a3afe74596d91fe113625014df8c0545b184d285dbfc43
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also indicates a high probability of maliciousness. The document body, though truncated, suggests a lure related to device pairing, directing the user to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9673

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
  • 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://irlanc.ru/pbw?utm_term=how+to+pair+logitech+k780+with+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451760/normal_604f3d2115352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_6046e5222eac7.pdfIn PDF document text
    • https://gibotekiwifij.weebly.com/uploads/1/3/4/4/134444926/tokewemowagataliza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fe126dc3b826.pdfIn PDF document text
    • https://fovevirikat.weebly.com/uploads/1/3/0/7/130775443/6842373.pdfIn PDF document text
    • https://xanowiporak.weebly.com/uploads/1/3/0/8/130814060/aac9e36d20a86b.pdfIn PDF document text
    • https://nibedubuw.weebly.com/uploads/1/3/7/5/137517062/8914e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5fe88f75af294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5ffff7b92c7c1.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/gonamilep.pdfIn PDF document text
    • https://gotedajasokidu.weebly.com/uploads/1/3/1/4/131407980/gugirol-guxituduxode-gisar-rapojoro.pdfIn PDF document text
    • https://temavemata.weebly.com/uploads/1/3/4/6/134611183/zixosulexukebi.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/1056662.pdfIn PDF document text
    • https://xugowumilivave.weebly.com/uploads/1/3/4/8/134846580/71af97b266d06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/259e04ce-b127-43d6-aa7b-14b2ce126f26/49060338384.pdfIn PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144436191/the_house_on_mango_street_summary.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144428733/wujebep.pdfIn PDF document text
    • http://silasofinat.pbworks.com/f/sufuvilukojetilikaxumikiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358a9c0c-6161-4a0e-bd65-59002e660e6c/13324036036.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/adobe_acrobat_x_pro_serial_number_list.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144437085/98974919476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a78140-3a5b-4e35-bcfa-9758d96c6ec2/cuadernillo_de_lectura_para_segundo_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e74920e-842e-4621-bee6-d9b6d4cc196f/who_makes_nordyne_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8761307-8d40-4a0c-89d7-b1ba248d1791/racing_car_game_ios.pdfIn 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_off0000eb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB04 5552 bytes
SHA-256: b1332f362fe025eb5c9f24bb601e652e37af8d239f596c0ff88af3f5eb202519

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