Malicious PDF — malware analysis report

Static analysis result for SHA-256 672bb33fa548c85e…

MALICIOUS

PDF

71.7 KB Created: 2020-12-08 00:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5b3f980643948499d77536f1e3a87ddf SHA-1: 23067c6fbf9f6cd3a4083f59953a475dbfbd335a SHA-256: 672bb33fa548c85e31d61c453cc4cb43e85ad57e3272801c21bd9c6b123ac9a7
156 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 0.9997

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
  • 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.
  • 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://traffking.ru/strik?utm_term=half+dwarf+half+elf+dnd PDF link annotation
    • https://xujurewe.weebly.com/uploads/1/3/4/8/134865393/zozido.pdfIn PDF document text
    • https://zomomawiwupid.weebly.com/uploads/1/3/4/3/134385308/foretuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fad2fdf5b834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fb44ce081976.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/28977536728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499a557b-548b-42ca-8538-2133997c88b1/bacterial_contamination_in_drinking.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/what_is_baroque_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7356ad91-74db-46f3-9020-c04798fba00f/indiana_jones_marion_theme_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf721996-45d8-4bb1-8113-85d060b9c485/forced_march_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/suxeperigozataferiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bcaccc-6198-4472-a12b-e06862a9a9c1/pattern_for_viking_apron_dress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63bc2f0-3c4b-4fa5-8a53-1d8a4cbf4dd3/under_armour_headphones_wireless_rev.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

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_off0000dd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD88 4868 bytes
SHA-256: 83b44d4f60ea86c86031ed1e6078fd35142476505c88532f4522631e036c8592
font_01_sfnt_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 10504 bytes
SHA-256: f4d216dec42de0c06ce4434eedd162d7f8c9c9c6c7434758c6df7c08c2c2e4dd

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