Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca48a20c5a6b8259…

MALICIOUS

PDF

62.0 KB Created: 2020-09-30 16:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b7f8368b4b33e9882dc991db2bdf2fe3 SHA-1: fbc38eb962df01eebfa5f69af502528fbcbe79e0 SHA-256: ca48a20c5a6b8259d9511428729ec53dc62de7fae648957380eaa53d2e08b888
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/strik?keyword=introduction+to+arithmetic+theory+of+automorphic+functions+pdf In PDF document text
    • http://surox.musicadventure.net/uploads/1/3/1/4/131452825/difetazepuxe-komowu-tefazomugub-pezuremenavizuv.pdfIn PDF document text
    • http://files.lundeensliquor.com/uploads/1/3/1/6/131606135/mugijo_kavepexo_xejuzax.pdfIn PDF document text
    • http://kugur.spiritofthe8thfire.com/uploads/1/3/1/4/131438137/movulax_mewuvovor_zoromi.pdfIn PDF document text
    • http://files.deathcareaware.com/uploads/1/3/1/4/131482937/zoxapitafurikike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d383fd43-1d9e-4f90-b3fb-4eaca0f49ba2/25491559009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996e390b-51bc-48b8-8cd4-d6f436499af4/47240629442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31632ec0-d0b2-4088-aa74-f15318742dae/rovilavuxelobafolunupives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/71313340434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9154/2423/files/cissp_endorsement_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4372/0868/files/lords_mobile_familiar_training_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/90574449840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/nijeguke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/96885018247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/cell_shape_and_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/zifutijuwulubibedewe.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 4

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_off0000b3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 5404 bytes
SHA-256: 99a865768a12f92b0e97b42d1bcc997915e1a0df5b7900e95033952fb9b451d0
font_01_sfnt_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 10736 bytes
SHA-256: f2d14cb2d8776acb881c9d575fb86f8c520e6c0ee020196df55c05de7d9430aa

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