Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf258309ec74b93…

MALICIOUS

PDF

42.8 KB Created: 2020-08-23 16:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4a29fbdc9d18f1b955a031888a84827b SHA-1: b07e526ab891f6660fe12bfdb610cde38c59d697 SHA-256: 0cf258309ec74b93258e726cb3e1af1c859f92c4db0b355f9885a9254cbea6f0
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://ttraff.cc/pify?keyword=acriton+12+a%25C3%25B1os+pdf In PDF document text
    • http://files.myfaithfulcatholicjourney.com/uploads/1/3/2/6/132695660/3893591.pdfIn PDF document text
    • http://gevojan.wherepainfindshope.com/uploads/1/3/1/0/131070786/juvowojusovaset.pdfIn PDF document text
    • http://files.lindsaydetwiler.com/uploads/1/3/2/8/132814166/domezivizogujif.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://cdn.shopify.com/s/files/1/0438/4640/2213/files/62853413229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/vuzepojerofesotale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5687/4151/files/35736643118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/45470638908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/banking_service_chronicle_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/13989546043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/how_to_hear_yourself_on_mic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5836/2518/files/analytical_chemistry_skoog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/pedixujod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/642908356.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/5048609451.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_off0000574f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574F 5172 bytes
SHA-256: 70bf4ede95cffe90de83c9c3deb041721225da77b39c43e2ec6388679dbd586d
font_01_sfnt_off0000689e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689E 11672 bytes
SHA-256: 0d3268b5ceeb3d58316ddbd4049e42e5b6cd5fc6762b084724e60cb3294bc2e0
font_02_sfnt_off00008ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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