Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da2913afb560c2e…

MALICIOUS

PDF

48.0 KB Created: 2020-10-07 23:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6df16ccc8657c4007d0d5f601c4e8606 SHA-1: 50ef6406a29c80f3d522a3204f96eb56787b8433 SHA-256: 8da2913afb560c2e6a5d755189ff05fb001b02fc872678145fff24224c162dd9
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=viessmann+vitopend+100+whe+service+manual In PDF document text
    • http://files.nanpokerwinski.com/uploads/1/3/0/7/130738914/newopivoturita.pdfIn PDF document text
    • http://files.thesouthmillschurch.com/uploads/1/3/1/8/131857193/pexokomu_gegigo.pdfIn PDF document text
    • http://files.phoenixaslcommunity.com/uploads/1/3/0/8/130873849/d38a7b66afeec28.pdfIn PDF document text
    • http://files.namiwalksaz.org/uploads/1/3/0/9/130969663/notabofe.pdfIn PDF document text
    • http://files.bellebutton9.com/uploads/1/3/1/0/131069886/natajom_jalunewojan_fepuz.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/d22e076f-91c0-40de-9a3c-be226bb0676b/kizovasifeworixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fd4851-d7e3-45b2-93a6-b250de2a61c4/jimixepafujalidaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a2a3bb-2bed-4d87-9e6f-f8cbd32c7e02/mijarojuzetovoniduto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea908af-ad37-4f29-947c-6e94c705914c/25351256225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5762aa7a-af90-48ba-9107-a6fee6117ea5/kutemisezuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f1f29d-f100-45db-9052-73e31f5a2dd6/mezev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a147581c-3c29-4115-b145-b52bc857de32/bidomajoroporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8be224a-56c7-4f64-902b-c3f1f64ac229/fujagosujavulisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df70d05d-e6c7-4750-ba5d-cad860f23a51/ximidizotiguzeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8499949e-c731-442f-acf0-2ab06ce9461d/dobokaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf897582-b601-43c2-892c-77e58d7d2b7b/batavogejexexog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e55f91e-11d7-4a10-839c-324f67368ad2/mamawuxiroponeletewotibup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de59aba-6417-47eb-a965-8e40765392f1/dofeku.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_off0000778a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778A 5624 bytes
SHA-256: 6ba6fa859e4103ac2c461e23d5a5bf41de0ecf52a8192fa8eb0c8c8d0a28ff45
font_01_sfnt_off00008a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9B 12604 bytes
SHA-256: 1d81df51d4063601cba3b3fa35de7f3f6cfae01bebb5349753248f09240e4d27

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