Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dde5ae27d0275f…

MALICIOUS

PDF

68.5 KB Created: 2021-01-12 13:47:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fde683c4e0c94a86b77d227169322b5c SHA-1: 6c2357786c2560f82bde0249a3f1330c4ac09aa1 SHA-256: 74dde5ae27d0275f60b2117fc174cafd5ed5e2a56636679c00c41f2ff7fb0d05
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate that the primary purpose of this document is to redirect users to malicious websites, likely for phishing or malware distribution. While no scripts were explicitly extracted, the structure and link farm suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/aws?utm_term=consolidate+worksheets+in+excel+2010 In PDF document text
    • https://cdn.sqhk.co/bedogipaxog/oGjjig7/92325990246.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/velukuziralijomem.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/ghcUxI7/zombie_hunters_arena_unblocked.pdfIn PDF document text
    • https://vagofavom.weebly.com/uploads/1/3/4/4/134486407/dalubaz-kefisisuxo-tonutewolufoxot.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/XhaO9jf/sitasexatigas.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/gKie5Ru/80718829388.pdfIn PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/sotisewew.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/f146c40047583.pdfIn PDF document text
    • https://rekizutor.weebly.com/uploads/1/3/0/9/130969391/volosusaxi-xemefejijadelu-sagiwixeg-fedavopid.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/rezugekolaba/chilled_water_pump_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/78521273447.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/the_reaper_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/66932806656.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_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 5484 bytes
SHA-256: c2ee9fcb87e306f3651b693ad508bf07bed0f26ee43b9421bf9e5022f683de1e
font_01_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 10744 bytes
SHA-256: e0a66fe1b9471ad86b67d6506b6dd08cb55c96aec9da9f9d14b8d96f716883be

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