Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f268315df8ea94…

MALICIOUS

PDF

85.3 KB Created: 2021-09-19 04:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3fcb2033e6e078ba549ec759507696e SHA-1: 8ad1655aaae6d934565b5c0fa57233899bcab2a6 SHA-256: e6f268315df8ea94119d0f73926d8c4b975a778a9b344119460801afca55fc01
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of link farms on disposable hosting, reinforcing the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://sirmamedia.com/ckfinder/userfiles/files/62010067205.pdf In PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/99712292725.pdfIn PDF document text
    • http://df-2.de/images/daten/file/rokonodisowupobopa.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/ginutodemokonozazej.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/88623098156.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/45014853181.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/zakimegapux.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/13030714220.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/47705989266.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wonurexavupiperumuxap.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/ziladivatusiz.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b9978eae0---53881973694.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/49688866422.pdfIn PDF document text
    • https://patc.fr/imagesfile/1386108660.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/jajevifetafafaran.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/95119444699.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/84425253361.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/lsm01ubkbr9uatob8c6tbg7kfg/bowofojatijanabobotedoxi.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/tavakejegojasuv.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/gonalijukasuk.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/80183488085.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/93341309831.pdfIn PDF document text
    • https://go2germany.ru/files/file/gavimugapujimiwotuvobuv.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/zumusejitiwiliwadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=1984+george+orwell+pdf+bookPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011869.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11869 16456 bytes
SHA-256: cd3c6f303c634d112a1759aa68e5d7f1b0abcd613aaa10fe650ef35aba88a851
font_00_sfnt_off0000c3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D0 24348 bytes
SHA-256: 7bcfa812422da57c2bb263d20bc8a1f42d94b6b70a24fa230043c5c4247a26d1
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 10776 bytes
SHA-256: 26d5ab8eff3e0be72abb677c671dda8b805ad7238e87803dcae428e82536e579
font_03_sfnt_off00012efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1