Malicious PDF — malware analysis report

Static analysis result for SHA-256 4409299366219ebe…

MALICIOUS

PDF

40.1 KB Created: 2020-11-06 12:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 971af49390091d4ee5f950523f4fe3b9 SHA-1: ae67cf2d03f238747a9526a34d066451905ad920 SHA-256: 4409299366219ebe719ca1bb18a462f3d348d55fe6d82052fcee314ab08799d4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/123?keyword=cvs+application+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8800fe91dbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f8eebd8ccc55.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/2b0f3.pdfIn PDF document text
    • https://zedaluridafam.weebly.com/uploads/1/3/4/4/134464222/likuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5f9576576b95c.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/tulosa/ethical_leadership_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/employment_income_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/the_achievement_habit.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/camino_de_santiago_etapas.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/house_orlock_tactics.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/65739786709.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/ditibagatozevaf.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/traxx_fitness_activity_tracker_manual.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_off000061d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 4796 bytes
SHA-256: 62e06cb5ab15712ebba22a4a4439b0373d8880fa7fed0cc1a4373b6977b2dc64
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 9840 bytes
SHA-256: 7157e15dcc24dcd317b72fc6f91d55222213e88ff693d987d817d666724af3bb