Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d91ad89649eeb98…

MALICIOUS

PDF

40.9 KB Created: 2020-10-05 04:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 0ba3762f8ba1427daa96384787c989d2 SHA-1: df75298201b05a8118bd016cdd890819f6014d3d SHA-256: 6d91ad89649eeb986246f04f3fb82b1917e8d9b97ca8eedc1022480ce16893e9
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://gettraff.ru/strik?keyword=bakery+story+2+mod+apk In PDF document text
    • http://files.camelotballoons.com/uploads/1/3/1/1/131163737/7013599.pdfIn PDF document text
    • http://files.florsomm.com/uploads/1/3/0/8/130874610/wimawemepabobub.pdfIn PDF document text
    • http://vadudof.boisalibiswas.com/uploads/1/3/1/4/131437181/8954604.pdfIn PDF document text
    • https://site-1039789.mozfiles.com/files/1039789/fiwiwivinudi.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/kadage.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/8ccf3a77-897e-4aa5-9587-6f5c82c80fa3/duxewupokajibusexibem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd1287dd-0d08-4e3d-ae1d-c12eb82ee255/47124055144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b63f0c-b877-41e4-97d8-12ee49b459c4/1116749496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df902a7d-34a9-4f2d-9ecf-a47acfc3f7bc/kapemebupikujevidezege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84fe2ae5-92f5-4e04-ac31-989b4cd28b3e/papepejigiwogejeriloba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40427f45-e512-4a44-94cb-95528fcf6d86/90505565267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04479404-80af-4bab-bdce-0c7b6ca5f168/bisidudifeferov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca6ca05-090d-4eef-93ce-5407978e42ca/mugebizeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a28f54-44c3-4f90-8c1f-c98f94e8bdb5/54633928682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69748854-6306-4b20-a173-2b5b71bc6d04/76547472595.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_off00006347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 5420 bytes
SHA-256: c203c7695c4cff9d1dea3d0a265fc92a44dca239a2cace1bf0c1d583d4a0a855
font_01_sfnt_off000075b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B0 9708 bytes
SHA-256: 0340619d47cc78bda2690d607cc4578a398616dc776b5b54e549129ef702cfbf

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