Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22369c0eb14b663…

MALICIOUS

PDF

35.8 KB Created: 2020-10-11 13:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8cc695717d6515119b0c9116ba768bad SHA-1: eae7e242abcdcbb412ed8a4aa391db85d31e34d5 SHA-256: c22369c0eb14b6637334493da1846029853d267702a3256f20ec34eff6dd3094
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://cctraff.ru/strik?keyword=ba%25C4%259F%25C4%25B1ml%25C4%25B1l%25C4%25B1kla+m%25C3%25BCcadele+ayl%25C4%25B1k+rapor In PDF document text
    • http://files.kelleymonahan.com/uploads/1/3/2/3/132303061/1486790.pdfIn PDF document text
    • http://files.nasrinbakheet.com/uploads/1/3/1/6/131606168/9693fbe1df6d06e.pdfIn PDF document text
    • http://jutirup.sabasphotography.com/uploads/1/3/0/9/130969354/8ae3dfe3cb47526.pdfIn PDF document text
    • http://files.livingstonemasons.com/uploads/1/3/2/7/132740288/b0758f7d9b7fd.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/81515659573.pdfIn PDF document text
    • https://site-1039958.mozfiles.com/files/1039958/mirozaxozalatezamu.pdfIn PDF document text
    • https://site-1043289.mozfiles.com/files/1043289/29328076449.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/38516371003.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/xogelaxuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4174/1205/files/bose_161_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5557/9046/files/yugioh_sacred_cards_gba_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1468/0484/files/becker_map_pilot_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6276/3160/files/53914396697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/engine_engine_number_9_black_sheep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8439/8246/files/mosinamomedujakupobupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1871/0951/files/36272859364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0191/3759/files/laguardia_bus_depot.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_off00004b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6A 5640 bytes
SHA-256: c31c950f0e981db26a1379fa5fd357012d889d668de595f174ebd0813ef56ef6
font_01_sfnt_off00005e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 10728 bytes
SHA-256: a4c8e4db8965c0c272cb708b70ee08729ce11298304ab5a843971d0ea1974153

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