Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58fc575c9d5e550…

MALICIOUS

PDF

46.3 KB Created: 2020-11-02 21:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a26de9694107915b3707f950179bc764 SHA-1: b9c1e10ecbf2faaea2788e1b72c234e93f68bef9 SHA-256: f58fc575c9d5e55074e8076a1eb06ad079024b7c0a27dff30379c4de5d15de75
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to a URL that promises a free download. The document body also contains this URL and numerous other PDF links, suggesting a link farm or redirection tactic. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=exodus+super+unlock+free+download+link In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f92036cf2284.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/5720346.pdfIn PDF document text
    • https://fumumakol.weebly.com/uploads/1/3/4/0/134017799/wojilufabete.pdfIn PDF document text
    • https://wejuvizir.weebly.com/uploads/1/3/4/3/134395749/mireduwusazosat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8725cba7daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_5f9442e60a7fb.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/d96ddb407408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5f938c83401ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8406/1101/files/karumudobikikarejakuwexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ff7974-bfb3-48a4-9225-38c2c65ac7af/mojiwunado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7593/5666/files/windscribe_vpn_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/ultimate_justice_persona_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/precalculus_with_limits_3e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9552/6049/files/concept_of_watershed_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6445/8908/files/idaho_falls_district_91_salary_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb135a73-be69-496b-8683-9250ec9ebc33/19640560216.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off00005cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 5328 bytes
SHA-256: 8b5cc17013f03757ad747d44b6ebdc0621d49554e2570c91a070c62f0293a51d
font_01_sfnt_off00006f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0F 10628 bytes
SHA-256: bff48b2b347208377a4f012fe1d282a2a77934f1832e4291765f4a9f9a68cf97
font_02_sfnt_off0000930d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x930D 17064 bytes
SHA-256: 349378c1cfd8c6f9c45b7a03a09b7bf6dd240639771a6651d41a1c4d95a1f28c

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