Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfdf19c84082fe8…

MALICIOUS

PDF

44.9 KB Created: 2020-10-12 22:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8f1248bb813e80388f9fc88b90cd96af SHA-1: bde614efc376467f54822e464dc331a2952049f9 SHA-256: 5dfdf19c84082fe81e03a62a9e39ca2c2ae8841bbddb1d655e991536714ed7f8
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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?keyword=entersoft+business+suite+manual In PDF document text
    • http://pujam.patrickracingbillet.com/uploads/1/3/1/3/131381658/tedegusa_tozojuzumukune_gexirukuz_xidunukagopip.pdfIn PDF document text
    • http://falexoto.studio50artroomexpress.com/uploads/1/3/1/4/131454762/4911318.pdfIn PDF document text
    • http://files.clevelandrelationshiptherapy.com/uploads/1/3/0/7/130775879/1732817.pdfIn PDF document text
    • http://mifaw.gdilawnservices.com/uploads/1/3/1/6/131636677/tosenanefojev.pdfIn PDF document text
    • http://kilus.honeycutthausshepherds.com/uploads/1/3/0/9/130969204/3030573.pdfIn PDF document text
    • https://site-1038344.mozfiles.com/files/1038344/81966670921.pdfIn PDF document text
    • https://site-1040037.mozfiles.com/files/1040037/71592809513.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/1/0266/9261/6390/files/the_seafarer_the_wanderer_and_the_wifes_lament_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1216/1442/files/sunglass_holder_for_car_roof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9453/1486/files/wivibid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0036/3675/files/ap_biology_science_projects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c828c48d-4066-464f-ba55-1b15afd60138/detunefidavovuxuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788c6db7-3d2c-4556-98f5-d2ec7915aa6d/38371384066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5123233f-e2da-4c13-9c69-34b694f32c91/93577876609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea3117f-7ac5-4314-8343-ccc7b27c3452/pedajekanuritiji.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 5008 bytes
SHA-256: 8256576037a529323ea8077750763d76a6c64085c896e5e993c0cdb7125379da
font_01_sfnt_off00008248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8248 10244 bytes
SHA-256: 73d1d177e188b7c55b72bf2d8dcfaa42cfd83c0f474a27d2cd5ecf56307d8eba

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