Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df70ed46b5593e3…

MALICIOUS

PDF

116.1 KB Created: 2021-01-10 11:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fa740f18d70d8d9041959ec767260885 SHA-1: 01165750f29c9cc49405aae07a578f74aa047acf SHA-256: 5df70ed46b5593e3d76d8c49e1d8e396e5e2fd6adba664c348e0ede853e55e52
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating it is likely a phishing or spam distribution document. It contains a large number of embedded URLs, with the primary one leading to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to direct users to external, potentially harmful, content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/123?utm_term=thomas+dale+high+school+calendar In PDF document text
    • https://cdn.sqhk.co/xogovofofi/iagetBE/49047782405.pdfIn PDF document text
    • https://cdn.sqhk.co/nibidawe/CjasZdX/bofozevot.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/jemgeDC/marketplace_mall_food_court_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/FhbqmDr/64503655360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fa689e369c62.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/bahfggw/79213743512.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ajighhh/meaning_of_neighbourhood_watch_in_urdu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465127/normal_5ff0ba4232f8a.pdfIn PDF document text
    • https://site-1175032.mozfiles.com/files/1175032/cat_run_game_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407331/normal_5fc0c7b9dc464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_5fdc719274d1c.pdfIn PDF document text
    • https://site-1175927.mozfiles.com/files/1175927/35937061200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5fea01e859c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5fc2095582e75.pdfIn PDF document text
    • https://wiperorapaxomun.weebly.com/uploads/1/3/5/3/135323561/6143056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CBF 5012 bytes
SHA-256: c91833ec3e1364765bb3b027996029d1036a989acd72851b62ad984bfc39cd4b
font_01_sfnt_off00018d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D8B 11912 bytes
SHA-256: 63040b5ccdc133b626a58aaf6064b47653e216a6aa80e6a9dd8cb1d2b7ed4b22
font_02_sfnt_off0001b47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B47D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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