Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc428c63e305048c…

MALICIOUS

PDF

40.1 KB Created: 2020-11-08 21:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8aa7ca937675e84dab94afcc0c33838d SHA-1: 5dec1642ae669a7988cb3b6a32d2c38c090a414b SHA-256: bc428c63e305048c40de236622fc57ae39e712e9a29a4060486741e1d694e7db
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://trafftec.ru/123?keyword=black+jack+gum PDF link annotation
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/6c2b1acaddc125f.pdfIn PDF document text
    • https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/7779347.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/tizomagegetisovas.pdfIn PDF document text
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/sebubuxat-parajefamenon-logekexife-vugojen.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/7294050.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/xifavabop_zadiwela.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/8750066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://kosajoma.files.wordpress.com/2020/11/48145725060.pdfIn PDF document text
    • https://paxajupivog.files.wordpress.com/2020/11/jukavorozegiji.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/somibugipupuxu.pdfIn PDF document text
    • https://vevarog.files.wordpress.com/2020/11/jackie_chan_torrent.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_off00006109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 5032 bytes
SHA-256: ba20dc9969d4aed2eecd83bb3399e2b0c79b6292d66b097acf4f4400988bf270
font_01_sfnt_off00007225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 9972 bytes
SHA-256: 6f0f3aa69254da8c22749df659835ea8519ce0c35b633851048e55f97db63556