Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0eb5f26d2cca98…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 23:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 493a500420449d0a68683ec76d7c9396 SHA-1: 7d633a83cd57447c1dfa3a9d74bf5687dafe49b3 SHA-256: 2c0eb5f26d2cca989a87d58e2cadac19567d8ec4629974e5a8d909b78275dea6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm designed to redirect users to potentially malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing users to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=dls+19+hack+apk PDF link annotation
    • https://pomacanthe-art.fr/imagebeforeafter/files/45035480289.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/91395983948.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/zameradaga.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/79306455857.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/62122825714.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/44389732293.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/88707742370.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e70a421bb5---vezenogenilavux.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/28179369130.pdfIn PDF document text
    • https://areicon.com/images/file/17364793996.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/degomimisapipijon.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/tabevisevalogugefiris.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/90266814525.pdfIn PDF document text
    • https://conrays.ru/f/data/23764368177.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/74573867340.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/bixomazi.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tulazelube.pdfIn PDF document text
    • https://duel.pl/userfiles/file/gulenafiva.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/50232422652.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b469f3c27c---84113772392.pdfIn PDF document text
    • http://zenithmetals.com/files/67302387050.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/24051054063.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/87069489658.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 19148 bytes
SHA-256: e3f28eb703e8cf9f000e7c432ffb32c9ac014de18adbed708bb474722a79f077
font_01_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 10140 bytes
SHA-256: 92317473ddd28a9a60bbd37cc6705cffe4cdab3e737988cfcefb3bef7454d2ec
font_02_sfnt_off0001227e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1