Malicious PDF — malware analysis report

Static analysis result for SHA-256 1112282fad82445b…

MALICIOUS

PDF

40.4 KB Created: 2020-10-07 01:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 79db15ab11c204de2a41115016ef4f24 SHA-1: ad6b895321c281dac18cedd3b82d9eb81081a3e0 SHA-256: 1112282fad82445b05ab5cf11614bb037685df842f0185ee197197bc5d8e2318
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://gettraff.ru/strik?keyword=saudi+arabia+hajj+fact+sheet In PDF document text
    • http://pofoxi.bsusna.com/uploads/1/3/1/4/131406286/3510361.pdfIn PDF document text
    • http://files.themodernretro.co.uk/uploads/1/3/0/7/130775462/javikipodomose.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/podagibekosimirefosage.pdfIn PDF document text
    • https://site-1037098.mozfiles.com/files/1037098/kafajan.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/jujobinerujisofuxafuvom.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/pibegep.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/1/0476/7557/2390/files/nijowitaxonega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3524/7271/files/65456603577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7503/1206/files/heaven_and_earth_shall_pass_away_but_my_word_kjv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0067/5995/files/imagine_charter_school_firestone_co.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4770/9591/files/faith_hill_sunday_night_football_2008.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_off00005f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 5396 bytes
SHA-256: 3db4152ab5a36bb6171df3584e0fd92b1c14aaacd5c30a36814b3c4c00118839
font_01_sfnt_off000071b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B0 10440 bytes
SHA-256: d3ccbb99025f7b1d957599c068a9efef82395ac3c43e0723f4ecc4e575369a17