Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5989a6010474656…

MALICIOUS

PDF

40.5 KB Created: 2020-11-06 01:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: cf3fb3489fa0805ea10b58e4da092a0c SHA-1: 247c842bbcae2740f0677a3d8e4a00a6e2f241cb SHA-256: b5989a60104746562854f628d7a49af9bf060fe749dfe14a4f569444684f6484
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=enb+night+eye+fix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f9f258633433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f9a2ccac4157.pdfIn PDF document text
    • https://luleloneluso.weebly.com/uploads/1/3/4/4/134450102/ba21bc25c81b.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/a8a8780e-9713-4690-8a58-36e1350bc60d/wulugofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb97722-25b0-403f-9da1-39917c104808/paso_del_norte_soccer_league.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847da347-c776-4295-b065-e4e980c8c6fd/ralegugojalobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d095ece0-3d4d-4d41-b815-5e30fac4e225/pomawafuwavogimuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af746049-ecdd-46c2-9f80-acdbe07b97d8/76882315099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93dfa2c7-bba2-4888-839d-12c228e4e0c8/26631425766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3ba879-7a56-4022-b05d-c44542570f9b/carlita_lagerfeld_dofus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d452bdaf-f184-44a1-aaa6-6595c5d9c6a8/fortnite_visitor_recordings_gotham.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca83cea8-1528-42af-8b9d-537a4d06ecb9/the_vault_guide_to_investment_banking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502ad0e7-84e4-4301-9110-7d06dad46109/dajuwikefotesirirevomexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e132d3d-0566-4f67-8ceb-502218519be8/80846640381.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/cardiovascular_fitness_definition.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_off000061fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 4780 bytes
SHA-256: e8b859d0fe108adeeab0d28592931a8256663e0e75962873839ec2640f1a56ce
font_01_sfnt_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10220 bytes
SHA-256: 55ea0edbac5c8a7e5ffa77a59332760cef344a7518b3865b98ab35af9fdd8710

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