Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d64d4adb663e8b…

MALICIOUS

PDF

67.2 KB Created: 2020-12-19 11:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: edc35117b54d15cb7cff39a6043c780c SHA-1: 37cea43771dacb29fd4c1011be3eba2731d48c0e SHA-256: 07d64d4adb663e8bfb8a6e1db77c4426feba6e6c53ab29b3ef2f13703ba999a6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The file also contains a large number of embedded PDF links, suggesting it's part of a link farm designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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://ggtraff.ru/strik?utm_term=mickey+mouse+statue In PDF document text
    • https://binenivav.weebly.com/uploads/1/3/4/5/134516867/xisap-matabumaminofam.pdfIn PDF document text
    • https://nipibodofabujid.weebly.com/uploads/1/3/4/2/134265940/solurise.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/f122e675c4ed.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.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/5a4a48fd-8a11-4b01-bf28-86a62fb7efd0/xewedijesa.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/xugijuputimexalewivabiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cded94-2550-44ed-b8ec-bf182650214e/y8_player_2_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a10b0b7-5cfa-465e-96db-b5f43ae44ec7/8135985490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f32c19-99af-4e51-8599-2ed743298a67/54879832357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73969e9a-c92c-4a12-b3c6-e864b0edfdfb/duel_links_neos_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/how_to_cite_a_quote_in_mla_style.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc548dcd26ff1194f90dc53/t/5fcb80849cf56e0e8b126969/1607172228884/muloxuwijarile.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5146cbd14ff0dd2b7912f/t/5fcce38f662d5e24e0a1fc87/1607263120345/hp_print_service_plugin_for_laptop.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_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 4988 bytes
SHA-256: 6838c8ad8336e119aa797d9666bbee6dc2795be1a0c608fd82f5c23c196c0be8
font_01_sfnt_off0000db55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 10404 bytes
SHA-256: 81c28be3d61f6e24cbc8474a51823250e0cfe5898a26906bbb8fd8c9b36dda59

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