Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9af2df6fbac0b91…

MALICIOUS

PDF

49.7 KB Created: 2020-11-09 01:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b19356b9e44605dedbe6beecf6010dbb SHA-1: dd39c3ce29bff9f1856962650ec68adca6dc9e6f SHA-256: d9af2df6fbac0b91e1bd2d070d1c5b47fc51b304d281a193794b431adc82d533
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://trafffi.ru/123?keyword=words+starting+with+cat PDF link annotation
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/6249854.pdfIn PDF document text
    • https://tukevoxawirunu.weebly.com/uploads/1/3/4/5/134584752/a6530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5f8fb309cdae5.pdfIn PDF document text
    • https://bebefezagogu.weebly.com/uploads/1/3/4/3/134372182/61c253f51393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_5f993387b0b46.pdfIn PDF document text
    • https://punekoba.weebly.com/uploads/1/3/4/6/134612552/wosiwul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5f9ae6877edb3.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/7f16bf7b86c76a5.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/103804ba-f3d7-41dd-aaad-0dfa3dfd1710/widozudaxawedokoguzel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b67629-9418-460d-bf06-fe54dbd29ff4/35716957101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8427b8-9409-49a3-8a74-fb1ae9b05100/examples_of_sight_sensory_details.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad22a8f-7443-401f-8e5a-d6d76cf4c472/strong_concordancia_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4d637e-9787-4fad-ad70-cbc5d0707b92/trenton_elementary_school_maine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075d9532-c705-4f98-a911-0741e003a234/gavididuvofiwanip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ca3cc7-0073-43c0-8812-176d97320447/falupiforavako.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000095a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x95A3 21348 bytes
SHA-256: 88a13a3b594c7320219dd351ac68e90b82ea38ed3d3cdcf660afe66d7152e0a1
font_00_sfnt_off00005ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 5276 bytes
SHA-256: 475cc12b4b70e67190b587c8c28c4bc425b39a4acd097ab3d9dc66b65af544cf
font_01_sfnt_off000070d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D5 10828 bytes
SHA-256: 3655a8e3b39d546b14c3a7c1f88490322a68e61e21f98caa6adf73b14701f023

Open this report in the interactive analyzer, or submit your own file for analysis.