Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed001bd166acf2d1…

MALICIOUS

PDF

85.9 KB Created: 2021-09-10 13:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b6a066c2b9e30d50f16b803df0fa73a SHA-1: b363783c56f9d7d9c15bc100d6669334de3f3fae SHA-256: ed001bd166acf2d151f0e08b629287e6e449e8eba8efa7b276fe3ae6879cc97d
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to solicit sensitive information like private keys or recovery phrases, aligning with phishing tactics. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://tahitotfalu.hu/ckfinder/userfiles/files/pisovizufaru.pdf In PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/78855918380.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/gefidakugapubenunavomar.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/50587396138.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/68618677155.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/93553196419.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/17721055888.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/72134017102.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/214d2c49d48b5c9ff96299acdad63baf/86591971845.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/90695685621.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/simezafubamesiveraxu.pdfIn PDF document text
    • https://sainaudit.mn/File/gozitubene.pdfIn PDF document text
    • http://ccsl.asia/files/13653194361.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/63341366779.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/mesirofudapeg.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134fd8ebfe7e---96078839890.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/duwef.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0gjddc3ipaah02v1d1ufkjlu0b/xulibivesudek.pdfIn PDF document text
    • http://www.polni.si/Images/files/rutimexuwonolug.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/faporunidukiguwaned.pdfIn PDF document text
    • https://kopari.hu/files/file/xifukibipewiz.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab868a3b03---45988834872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=capcut+video+editor+free+downloadPDF 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_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 10728 bytes
SHA-256: e71f96b1631deb4fb3007fd7273f89be122b6094cf448bfc538d9ea8124e8b2b
font_01_sfnt_off000101a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A5 18484 bytes
SHA-256: 38b5bf9497f1e6f30d8af1dfd85ff4f6a6276cf8478f4c9c785121d13eb36051
font_02_sfnt_off00013186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13186 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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