Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d090e2960f4955…

MALICIOUS

PDF

39.8 KB Created: 2020-11-09 03:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e2dd15930b1b90511c03fef740acbcb0 SHA-1: 6d4af2dd2892d30f2b5bdccf695feac02e8d4435 SHA-256: c1d090e2960f495526f3a689330af20afb8a21ddd73249e43307f12f962c984b
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/aws?keyword=lego+star+wars+minifigure+price+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f9efd1437ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f924d63de334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f93ad1929b98.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/764822898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f9009fb8bbdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_5fa029c5e98f4.pdfIn PDF document text
    • https://nupureforisuro.weebly.com/uploads/1/3/4/3/134353583/japotimik-devaluwakol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_5fa6304c9ed11.pdfIn PDF document text
    • https://vokujesezi.weebly.com/uploads/1/3/4/3/134306830/d20924.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/nafibanefexex/adwords_display_advertising_exam_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63022f9f-5643-4f86-8317-012c9fa8f281/tixawaguvinapemuma.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/18347270254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ac7769-43b0-4435-8cff-2df64ebacbfd/89786677165.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_off00004e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E7B 5356 bytes
SHA-256: b87ef34460770872aee7f11ccd0ca6685506bd810d991bbc4a6d6677c6f05d8e
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 10600 bytes
SHA-256: 54d29d9f9999d5d1d0d51e38b9e0313fccf1dd58a17e2671a1b48c5adcdbb90d
font_02_sfnt_off00008441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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