Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab84f27f62f6035…

MALICIOUS

PDF

41.9 KB Created: 2020-10-10 04:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e866467f1718d9fdefb676e8f4af9cac SHA-1: f68cbd16dbc6d0b8e8a05c712715021b8cd13388 SHA-256: 5ab84f27f62f60358b61d1a5672b9de530af02ba43c98bcf10769079d8b2b49b
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=trabajos+de+espa+c3+b1ol+para+tercer+grado+de+secundaria+en+estados+unidos In PDF document text
    • http://zamuzevup.bcox1.com/uploads/1/3/1/8/131871592/mafatobemutam_nalovu_petodaputebeni_rawugatuw.pdfIn PDF document text
    • http://files.summasportswear.com/uploads/1/3/1/4/131453807/118d8e22a22790b.pdfIn PDF document text
    • http://bemajirod.belizesportsoutreach.com/uploads/1/3/0/7/130775166/fapomi.pdfIn PDF document text
    • http://files.scjmg.org/uploads/1/3/1/8/131871484/kamakolowizep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed6a8dd-b20b-4530-a1db-60b09325c2b1/tibetogukir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaca9cf9-bdfb-4b0f-9c70-1f98e7057e0c/62606269465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2289/5272/files/if_you_were_coming_in_the_fall_readworks_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/world_war_1_word_find.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ba9d505-8de9-43bb-bf39-3df0ea9f35b5/59453020066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831e2486-0344-432f-8e00-a1cfd8801fcb/5577770838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901b8aea-5879-4ba9-81aa-b055bd24852f/zuxuxibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfb8162-9d3c-48a2-8863-7dfa56a053bf/89605814236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6202b8a-ca8b-4643-8fd1-7b9df0626df1/falidagitidoniwo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 5624 bytes
SHA-256: b3c97ffa596beab72f494c74e5ceb054a3ea3a29be6328ba52bad4532d34011a
font_01_sfnt_off00007448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 11000 bytes
SHA-256: c882d7d88ae85d21238917e84fe462447af799486e3d7bfa946735d826f4e1d3

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