Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2722c27c37672d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 01:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0a2b8794fc62fbf1f1e7083a9d982839 SHA-1: 3b4f747f369325c57a8a06a84fd80ecf95a92dd3 SHA-256: 6f2722c27c37672d64fbdc2f174729498bb578a9ce277deb475e4d511b564a00
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161325c91034ed---57312766990.pdf In PDF document text
    • http://gaestehaus-am-erlkoenig.de/img/editor/file/semadewejafukulalusidex.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/zopufukuveve.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/xobazamubukazurudupoj.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/657521012.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/tavatufofanet.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/69425031820.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/mozotezu.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/6829486580.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/soxolorisil.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/wulifujugakozupa.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/386ba0679d41226996677216bfbc45ee/dunazemojanurubovigesij.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/31202344566.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/sokunabuv.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/zeduginukaguzosigixok.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/36433478664.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/92729192337.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/jovedezeguzutetufipebu.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/3208729758.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/20199834322.pdfIn PDF document text
    • https://1tlstar.com/storage/uploads/files/68261480891.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/36453432830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=can+u+see+who+viewed+your+highlightsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 10924 bytes
SHA-256: 1f410f0c2027f6ccf4738aec77f1aaf94561ca36c33981110da7c0a4dc60a768
font_02_sfnt_off000117e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 17232 bytes
SHA-256: 176552c3c7642eb2ca7a5daad991741bf5e2cbe7b80dd9b8db44c5377c54f849