Malicious PDF — malware analysis report

Static analysis result for SHA-256 934c6c32769efd67…

MALICIOUS

PDF

52.8 KB Created: 2020-11-09 04:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5ffef12084f1a6957b9967e634e79030 SHA-1: 1d9b2e809ab5d151f340390105da9763a12f70a2 SHA-256: 934c6c32769efd67a6141937bf43aa835bac6bd9482a2ca49d8050f3792abfe1
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://trafffi.ru/123?keyword=watch+the+boys+online+free+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5f952c35a2851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5f9a794608a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_5fa0311505efa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_5f934f4fc95ac.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/demuluzuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://monirasuwa.files.wordpress.com/2020/11/82155965525.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/7403078407.pdfIn PDF document text
    • https://xarewexupi.files.wordpress.com/2020/11/fukelomubuwuvukixobugir.pdfIn PDF document text
    • https://tilidefixof.files.wordpress.com/2020/11/resident_evil_4_english_apk_obb.pdfIn PDF document text
    • https://tilokas.files.wordpress.com/2020/11/45523438603.pdfIn PDF document text
    • https://fepedibekup.files.wordpress.com/2020/11/android_programming_the_big_nerd_ran.pdfIn PDF document text
    • https://rosumig.files.wordpress.com/2020/11/gum_drop_hop_3.pdfIn PDF document text
    • https://xovesajip.files.wordpress.com/2020/11/programming_erlang_joe_armstrong.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/non_diabetic_hypoglycemia_diet.pdfIn PDF document text
    • https://sizixef.files.wordpress.com/2020/11/91626418358.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_off00008f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F25 5364 bytes
SHA-256: 4acdb6a4c26152d5abecdef4d5dadab2f949cc4b67158e53230154f341515b63
font_01_sfnt_off0000a16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16D 10896 bytes
SHA-256: 85d8eb7cee363d00eb80e239b88d477efe4f5fa3f59af9b9fc5723f9a5aadde8