Malicious PDF — malware analysis report

Static analysis result for SHA-256 c584de98009b7151…

MALICIOUS

PDF

87.6 KB Created: 2021-09-12 05:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ccf57af3c793848502c509276362ac6 SHA-1: 314c86ba404932734af23d4c3e3b05bbd4ec226b SHA-256: c584de98009b7151a3ef9c4f4262462529c40fe556827e9091766a1a4f204f46
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, a common tactic for evading security gateways. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs pointing to potentially malicious files suggest it acts as a downloader or redirector for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161344f10eb965---69919942395.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb4bd39393---31095617695.pdf
    • https://dbjadow.pl/attachments/file/tanifakugasi.pdf
    • https://probidjp.com/ckfinder/userfiles/files/20210909_131914.pdf
    • https://0955205219.jwa.tw/userfiles/files/vopexu.pdf
    • http://gramercy-grand.ru/files/file/61787931578.pdf
    • http://chornakorn-packing.com/ckfinder/userfiles/files/betadugiku.pdf
    • http://ykzn8.com/upfiles/editor/files/75038686481.pdf
    • https://libertyrealestate.in/ckfinder/userfiles/files/zasuvej.pdf
    • https://florerialafloresta.com/ckfinder/userfiles/files/revokoparuragupugodutu.pdf
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/saminikudeni.pdf
    • http://superlitefan.com/uploads/files/23231573358.pdf
    • http://nkmate.com/FileData/ckfinder/files/20210901_97C264244E4FFBFE.pdf
    • http://free-note.kr/files/fckeditor/file/15079016886138d74461ced.pdf
    • https://gkscam.com/userfiles/file/bufikusuxumunabed.pdf
    • https://juvelyrikoscentras.lt/Files/file/92465946044.pdf
    • https://ikuseikyokai.jp/ckmedia/files/54539046111.pdf
    • http://mobiliteit.nu/files/65356361130.pdf
    • https://archielectronics.com/userfiles/files/20212445289.pdf
    • http://yuha.be/_files/file/2605921328.pdf
    • http://fermobkorea.com/userfiles/file/20210907103601.pdf
    • https://learningsolution.ca/userfiles/files/93751466468.pdf
    • https://radekslodkiewicz.pl/files/file/komotalofizerejov.pdf
    • http://e-park.es/img/uploads/files/70394243910.pdf
    • http://kondicionery-himki.ru/upload_picture/file/ditofifaxidowebig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pasar+los+contactos+de+android+a+ios
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 16792 bytes
font_01_sfnt_off00010726.bin
81375678a590fa024d88da1d4433c0eb640f805a3bec8a88ee14c5e316b3e20a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10726 10364 bytes
font_02_sfnt_off00011eb0.bin
c1953d62898e38b30aefc05e4e6c72dd7a6247639ebac1946d980bbb5708ca8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 19580 bytes

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