Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1194e8f309a0b25…

MALICIOUS

PDF

52.4 KB Created: 2020-10-28 14:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6c483301befc5bf3b28a558618cf3b6c SHA-1: 42bbbe4784ec48bb9e18b4d0b66caf40ff4b98c4 SHA-256: c1194e8f309a0b252a076c7092aa1e41efb5b877d8bb20fd848ef6c40d7d4fb2
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.link/123?keyword=escuela+de+negocios+por+robert+kiyosaki+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5f98744cef704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f949b86dcf79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f9393e17143f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000803b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000803b.bin)
    • https://uploads.strikinglycdn.com/files/80e5e432-cb70-4a5e-bd62-ac433af4bba0/jokudexivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3ede81-8a27-41d9-b52d-9fb082991e3c/lowolazorow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a6aebc-8182-497c-b0e9-b2fe203b4109/92816539182.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/5933822318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7905/5000/files/50530697399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/unfair_sonic_2_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc70e073-748b-4ffc-8609-5235d7cbf8af/nubijusexotalepeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/januxatezemuberofukox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3acc3d29-fb5d-4cad-997f-9859de208ab5/maus_and_here_my_troubles_began_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/dobigugupojixabiza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8153/8975/files/flexipump_interscience_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/general_anesthesia_medicinal_chemistry.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 extracted file (font_01_sfnt_off0000803b.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 4704 bytes
SHA-256: ba9b53e38a2b4eb31599f039a779a1415c44d18f658ef2f6b2f5307cecc09c96
font_01_sfnt_off0000803b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803B 5588 bytes
SHA-256: aec098ab6d07c02302135725d5d1fa80e881fb281018950675030957968ce4e7
font_02_sfnt_off0000934e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934E 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00009bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDC 11764 bytes
SHA-256: 867124814630c119c4918ed1e90f7d8c17f6602c4de5d55d4b4faa5ae4a05bd0

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