Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc96815768daece…

MALICIOUS

PDF

43.6 KB Created: 2020-11-08 16:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 773bca8aba6f9bc8e7bff0892d63ac44 SHA-1: 4aec6263558b987775ca133c3a72ba521a5f3d35 SHA-256: bcc96815768daecebbd5b6aa44fe8ddb3997281452ea552859a118e198d9e5dc
136 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.
  • 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.
  • 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=stellar+phoenix+photo+recovery+activation+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f928bc8ecf32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f9082a08dbcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_5f90ff22829ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5f8dbda5e0f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_5f9b62b1dbd6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8936a9a91cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5f9d864eb4803.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/5826955.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lajapadawosi.files.wordpress.com/2020/11/kebavujovuxewogurawukelo.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/fuzupopulenilofonubo.pdfIn PDF document text
    • https://pirurupi.files.wordpress.com/2020/11/fakaxajafadamotules.pdfIn PDF document text
    • https://s3.amazonaws.com/kafifawono/lumobozubeka.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_off000069fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 5240 bytes
SHA-256: 9346e63f75bf19cea3dd1764e78d521975b752799a58f8bb6e0f3347f2c2f968
font_01_sfnt_off00007bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 11072 bytes
SHA-256: cd3a967bb7e96492ffd41c40ef0c86ce1a6e708e22016db0dbc7dc204f83b463