Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72b99706ed5a132…

MALICIOUS

PDF

72.7 KB Created: 2020-11-19 22:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 924ae256315eca5098815d7c86f687ef SHA-1: e1f08b05589128abe637393b6d7da7a8f1ae82e1 SHA-256: f72b99706ed5a132f0f99b62287862367c5cea6bca6b2e12687d53be35f1cef6
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links and a document body that attempts to lure the user with popular media content, directing them to a known malicious redirector. The presence of numerous PDF links and the ML classifier output strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=game+of+thrones+2.+sezon+8.+b%25C3%25B6l%25C3%25BCm+fu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f956826db47b.pdfIn PDF document text
    • https://xalesuben.weebly.com/uploads/1/3/4/3/134368019/gerexotomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f927aa3f3001.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_5fa923f5cb930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5fb28c4e60158.pdfIn PDF document text
    • https://juvidefe.weebly.com/uploads/1/3/4/3/134319267/sakamovepimaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f9b1f0e470ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_5f8c2233c5b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_5fa59e13722cb.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/kakef/moxewewawisekisibus.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/49134341778.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/the_norton_field_guide_to_writing_5e_citation.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/plazma_burst_unblocked_77.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/zemuderokiwajimipa.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/hp_pavilion_laptop_-_15z_touch_optional_5mu54av_1.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/komadugigogawokumugaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/portfolio_design_architecture.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_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 5844 bytes
SHA-256: 454172b6bb456321fab30861537662693e2b12e7b64907c2a8a98b92cd5d0dcf
font_01_sfnt_off0000eb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 12800 bytes
SHA-256: 6b897ddc43b13aed25c0dc3d026493d9b5f82b07a04f80cbed796bcd4ae42adb

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