Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feb73180af61d10…

MALICIOUS

PDF

48.5 KB Created: 2020-10-17 11:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f60e9edeab7060aef2e533eaeb81adab SHA-1: 1a2be83cf4369aef549edf338ef12aea761e3647 SHA-256: 9feb73180af61d1085088ddee2e40d2df871f994efd43738d685e3c95ac38a67
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://ggtraff.ru/strik?keyword=the+seal+of+three+eso+uncover+the+traitor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f8a2137ed67a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f890b61d0899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8717687e8ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5f89caf423042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f8866390eb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f890b18181b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f873720ab74f.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/5957543.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/c8731d88213.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/domovodibaposix.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/85f5a0.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/7098927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5e0b0e1c-e34b-45ff-a9ed-405277e69295/93092064782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0fc83b-556f-4718-aa63-5631a18fab70/gepejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95456d23-7463-485d-b696-26deb4025561/57492301419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0617411-90c6-4116-ad3c-df88434190aa/21228956099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f65714b-f711-4cee-b735-a24c693c73ef/18411980860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4ab415-d8de-4081-b25a-e30b616a659f/kuxivitudosek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb80e754-fdaa-45f4-b08a-6eaff6e60712/sunipododitikitezop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece8bd4e-0f60-465f-b039-02deace54530/sosokudogesaputuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aeabd55-a055-4d0a-90ba-6a7c141508ac/96016436794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7431596-bac7-4f93-a376-4f46b128aa47/jigagabopimimumotokulatub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7323 4860 bytes
SHA-256: 004537e939805bd46ea3777522d4717a8015526d5486715306151403caa49660
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 10076 bytes
SHA-256: 7a80193b33714cb534bcb3ef2a21c69d24bea6a7da7bc4de8e4db759a889feec
font_02_sfnt_off0000a628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA628 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3