Malicious PDF — malware analysis report

Static analysis result for SHA-256 950ee0914447f49a…

MALICIOUS

PDF

41.0 KB Created: 2020-11-06 03:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c1c9e9e9cd6db7e007ff01231e783a97 SHA-1: 7cb9cd56bf26a65a470221506913ad20a65112ae SHA-256: 950ee0914447f49aa1a941cc9236f85922737394a3f5605930689271ac1cbafe
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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=g+switch+3+unblocked+333 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f88452e250d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5f92fd94423c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f8bc067d5c97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8718079d90e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f8dbfd1923e3.pdfIn PDF document text
    • https://wejigawavopon.weebly.com/uploads/1/3/4/3/134305277/tidaxizej_ponukos_mixemozabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f950c434d9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5fa2931783a11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8a206d091a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5f9da1c03c4a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9cbe2e9dd0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jadere/candystand_miniature_golf_game.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B3 5096 bytes
SHA-256: 1a284e7e207401f00ff6ee2ce6fca7bedcfeca38c5ede42693387353bd8c27f3
font_01_sfnt_off0000660e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 10620 bytes
SHA-256: eecb63d708523c8204c8476cef645e988ab0f86627de15f87afd384b4751894d
font_02_sfnt_off00008972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71