Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc54517346d1652…

MALICIOUS

PDF

79.3 KB Created: 2021-04-05 16:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec109e243cdcef582a2dd80c5fe784c SHA-1: d2a348044bf5405b3558eda4a9ed7ec931640bcf SHA-256: dbc54517346d16528a9eac3df8f3dffdfeebe55a846291328202b961ed326144
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs and the document's structure suggest an attempt to manipulate search engine results or redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=labour+attendance+card+pdf
    • http://jexekiraj.sportsontheweb.net/dled_assignment_front_page.pdf
    • http://kotudekudoges.getenjoyment.net/wututuxedutixamovakupol.pdf
    • http://vifubavawet.mygamesonline.org/black_panther_party_ten_point_program.pdf
    • http://kuvenumine.mygamesonline.org/rectification_of_errors_ncert_solutions.pdf
    • http://sawedes.mywebcommunity.org/tikizofesosup.pdf
    • http://miwewumexurigan.sportsontheweb.net/bunuka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1ad37b29-e611-454a-a788-0c13e1d2fcd8/the_bluest_eye_film.pdf
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_05aba14a225d41339303f4d9011cf500.pdf?index=true
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_76df4d64895144da8445e23dfcaa5cd5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/85d971b0-6547-407c-bb39-237b3728b792/43973250937.pdf
    • https://uploads.strikinglycdn.com/files/26fd367b-5aab-4909-96b1-2e401d0b714c/80139463500.pdf
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_b137f4637bd84699b61cf4fbe8dd7901.pdf?index=true
    • http://relivoziz.atwebpages.com/27290095324.pdf
    • https://uploads.strikinglycdn.com/files/a4854fbb-2953-4a24-a103-0670201fc505/kekovexidokupo.pdf
    • https://uploads.strikinglycdn.com/files/3a37bcbf-a837-40d9-98f3-9ae57b122436/90465616421.pdf
    • http://gavawekib.myartsonline.com/because_or_because_of.pdf
    • http://dijuvunote.onlinewebshop.net/fekufupenalinil.pdf
    • https://uploads.strikinglycdn.com/files/b6a7c441-951c-43af-9b44-c02505f9c19a/misigupiputix.pdf
    • https://uploads.strikinglycdn.com/files/26b44a31-7030-4e7a-92af-b7cf12f1dcd7/situgeze.pdf
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_1d6dcbc3bd0f417692c054690d8328cf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3ab1d73c-b0d0-4965-a4b9-ea97fa403b9a/tawisaderovebu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edec.bin
bc9d2d5293c6cb043037e363a5f5119e8e13b8d1f126771975a6cbe2b874c606		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 4852 bytes
font_01_sfnt_off0000fe6a.bin
4dc19d61a11d185f46da78e330340ecea903f375a8d91e5ba383fd753dfba4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 10356 bytes
font_02_sfnt_off000121dd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 4324 bytes

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