Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9397f739cff9b9…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 20:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: efc63db044eb0460931fd6eddf08dd3b SHA-1: 522dd149a7a383565cac43482cd71f8281b6d636 SHA-256: 6c9397f739cff9b97e68cb8c452182c86e8d7657226d7c4345dca0bb7ab5d82a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://botokaw.ru/wix?keyword=cfg+to+pda+code PDF link annotation
    • https://cdn.sqhk.co/satofapo/ahj1e2c/32917557485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_60123217c3252.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ChjGWwz/pizoxixola.pdfIn PDF document text
    • http://pisumuvate.sportsontheweb.net/81450096139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_601563cfef81c.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/v6ghibI/car_park_crowden.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/how_much_does_david_beckham_worth.pdfIn PDF document text
    • http://samemere.mygamesonline.org/breakthrough_plus_4_download.pdfIn PDF document text
    • http://robekilatufage.iblogger.org/27682740631.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/rujagud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_60434997502ee.pdfIn PDF document text
    • http://botefin.medianewsonline.com/34163801502.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/sojakigejozefikekujalis.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/cracker_barrel_menu_breakfast.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/xadaminumubesuxeze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dozonox.epizy.com/lagu_dangdut_rekayasa_cinta_camelia_malik.pdfIn PDF document text
    • http://levaduru.epizy.com/mitalirumuxi.pdfIn PDF document text
    • http://litorow.myartsonline.com/advanced_engineering_mathematics_10th_edition.pdfIn PDF document text
    • http://tiwebukesa.epizy.com/zetifigunazepaxexobulifi.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/15573893780.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 4920 bytes
SHA-256: e389f05a4d94efa1e69d6ff26d90c89ff59e2031083e21cd0e7d4be91562e44b
font_01_sfnt_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 11576 bytes
SHA-256: 682bec74f2d8df23a623c5fca6e30fa34674e0c916f121b3c92c8eef0c3aa3ad
font_02_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 16144 bytes
SHA-256: 25dc1b7d69cb91644f28a5d849e004c6f464f5b7ca2df743cc20f0bbd1bcfc9f

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