Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b74109f32efea6…

MALICIOUS

PDF

40.0 KB Created: 2020-10-01 18:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9d33b9841ef6e53368357601a9d10a7e SHA-1: d1a2c8a2803afda86adf8fea74da1db859b23cf6 SHA-256: 37b74109f32efea62e69bd893d258232e6d911113fd517472b2de111c438a2de
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=code%253A+the+hidden+language+of+computer+hardware+and+software+pdf In PDF document text
    • http://jivovoxot.accessibleveganadventures.com/uploads/1/3/1/4/131453046/xuxovel-siligi-mibuba.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/1/0434/3840/7832/files/stoichiometry_mole-mole_and_mass-mass_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/unitime_exam_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0352/2467/files/halloween_1978_full_movie_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e798e4fd-894a-4b34-945c-5cd9b6448b16/mulazonapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d4e584-c1bb-472d-a6f5-ec2d88b0ea1d/97394870942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/gerd_diet_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/great_kourend_castle_teleport_osrs.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_off00005ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CCC 5616 bytes
SHA-256: e070c197d50c84f3fcc649f33a0c4733bf55c08ddd262ab4bfbbf1dfce468311
font_01_sfnt_off00006fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 10396 bytes
SHA-256: e7880e9a0842a3c1bce7a94e83a501756f3a4276e438526c7a189309cb626fba