Malicious PDF — malware analysis report

Static analysis result for SHA-256 d84533300bcef67d…

MALICIOUS

PDF

71.0 KB Created: 2021-03-22 14:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b807d40a2e2a0471c427753c209a08de SHA-1: 8cd32de2cc397e43d267b50435f16560f1a56bfe SHA-256: d84533300bcef67d21280645881b75052c96ab83ede6859d6d8dec5fc131c9bf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://baarspo.ru/strik?utm_term=steinbruch+winterle+geometria+analitica+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481675/normal_60309a077c623.pdfIn PDF document text
    • http://bettermoneytips.com/gmat_examg9x6u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459164/normal_5fd6eb1964d33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fcbaddfc1561.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/dlKeETV/rovevufer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_6031f635b65ee.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/imhixjh/25718856509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_601e2020d6cf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_6020519de9892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5fd9d829e7a8b.pdfIn PDF document text
    • http://beliyden.xyz/25621955992v872f.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/gdNjzGE/call_of_duty_warzone_free_ps4.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/honda_craftsman_gcv160_lawn_mower_partsp0sb4.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/985e40490a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_60314cdae21aa.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/sudofazudukejaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_60219baa2c65a.pdfIn PDF document text
    • https://cdn.sqhk.co/nedevupoj/jjrLRid/flying_monkey_wizard_of_oz_costume_diy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_f7dec05e2b104679b7bb7dcb10803890.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_0543f97beefa47a2bd5e2d50e14aab7a.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_16dd601f0fb94804a0e9355e9ac5448c.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD161 5728 bytes
SHA-256: 39b8c8abbe4a7e0ca02546cec2a12c0ef1bf5fd4e9117cb96aaf4697abafc90c
font_01_sfnt_off0000e4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C9 12616 bytes
SHA-256: a7e8d7516efdd0f75b30d8b4f13a45f2859c060141470718ef7b45c8f6209bc5

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