Malicious PDF — malware analysis report

Static analysis result for SHA-256 a173f35461ef644e…

MALICIOUS

PDF

40.7 KB Created: 2020-10-02 01:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 88a8c12ffc7f3ddce14fa18f4536bc2e SHA-1: ad7df93c397ee211abbf5798749a380bed48aa37 SHA-256: a173f35461ef644e154fb16e21371083675a25b59da32edbde5d602045459b0f
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=ritz+carlton+credit+card+benefits+guide In PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdfIn PDF document text
    • http://files.exquisitetouchdesigns.com/uploads/1/3/2/6/132682878/8793247.pdfIn PDF document text
    • http://files.newtampapainters.com/uploads/1/3/0/7/130739996/ecd4b5a3ccf.pdfIn PDF document text
    • http://gejabaju.alycewolfe.com/uploads/1/3/0/8/130813650/xanujuvizotigab.pdfIn PDF document text
    • http://turaxupif.crescentbaydollfanciers.com/uploads/1/3/0/7/130776208/wonumadipazatoxuzuku.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/lewotojisoxufazugokerovag.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/55592540852.pdfIn PDF document text
    • https://site-1036734.mozfiles.com/files/1036734/28378893775.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/755da2fe-6d89-4bee-9b7c-9a8a3d694f83/sixogukuvug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83ac8ed-c442-4c50-8f3c-705404a7cad5/20939974719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c65949-385e-4a8e-88ee-c1f6cd7078b8/90807346129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ea002d-8994-40f7-b16f-a5f9b1c7ba7d/vumaniboboluzikuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d51105-2d8e-4463-8b40-dd0ab364e96c/96246371572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9f315b-b01a-42e7-a17b-857d2f29d609/webej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3dd91d1-4905-408f-b77b-4e37d2092ffa/81730930552.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_off00005fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 5388 bytes
SHA-256: 1753e3ee0f11814e95624effa106734acece115a941aab1e074480c6c04a46c5
font_01_sfnt_off0000723b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 10408 bytes
SHA-256: 357600bce58dd9c333565d1f61efcbf1f32155f5f6eb4d904d40eeace26cda52

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