Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d42e9d6c9b78a7…

MALICIOUS

PDF

41.3 KB Created: 2020-11-07 07:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 207e188ac4e4a1cda7e45160c3519c3c SHA-1: 7dd6d78a6cb4522c1fdc182dd13fac48228b1a9c SHA-256: 33d42e9d6c9b78a7dbe25a5fe0a2eb1863f0da19dc93112ba7c25bcec49581d8
126 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wp3?keyword=ielts+liz+vocabulary+pdf PDF link annotation
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/8214817.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/4ffdaa19f.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/lijiferuxa-wewesokaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f8e3686f0d1e.pdfIn PDF document text
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/a95c201a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fazezole.files.wordpress.com/2020/11/metafsica_da_sade.pdfIn PDF document text
    • https://xilatubak.files.wordpress.com/2020/11/volvo_fl6_workshop_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88566fd-2f6e-4abc-8164-5ca38bb4cdda/md_new_hire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d86fb0-272e-40e1-941f-54448766dd06/vexejidowexelofefadaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f38eb7-f613-4f90-a7ad-d103b402dcaa/77225585132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80ba931-20c6-4c87-9963-c9ed7d2da284/32709073596.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_off0000626a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 5440 bytes
SHA-256: 59a0ed8c7a7f87c2fda6429c6dead97dd314030a1d1f83593259ff857cf57817
font_01_sfnt_off0000750a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750A 10588 bytes
SHA-256: dd125d88d4d1d87355d7589fdd90f85845514e57f37d696f94c735a340032035