Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2c68ffc4da3f42…

MALICIOUS

PDF

79.2 KB Created: 2021-09-09 04:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4d60db0b055ac059c14c0cb7769f20cb SHA-1: 71e3c4fe363c6e5ff1839eb5963ca5e318968076 SHA-256: 9e2c68ffc4da3f42f6fbcce8bc3a4aff429669bb44c9b18cd1e2abda2095eadf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://swapnauraan.com/ckfinder/userfiles/files/59161680199.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed836eaa5a---xivaja.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/70285336391.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/narigikasejetodavodamimu.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/263d55de9c4e51e57ed7f2600dfa1d70/mobulomegevotel.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133582ba2fbe---28480392479.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/neduviz.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/a6c9283a4faed283a9dcfdcafbc2c0c2/kowagokobunujitusovub.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/86503589706.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/53394472650.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138da419c602---91428522418.pdfIn PDF document text
    • http://sonet.vn/uploads/images/files/22404917202.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/kajulexetodi.pdfIn PDF document text
    • http://rafaelokazakov.com/file/10646788665.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613280c800d43---1976225755.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387a1c2736a---57873633227.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/43821339045.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/tatazinolexixuxixino.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/57643008925.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/3156680935.pdfIn PDF document text
    • http://rjt1.org/upload/files/midixogasetosavejigonom.pdfIn PDF document text
    • http://lollanaclinic.com/image/upload/File/26425951214.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/35051531632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+act+of+marriage+after+40+pdfPDF 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_off0000d29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29F 17060 bytes
SHA-256: 960287410fac0bba361dc99ca841d3a02f23bc49e96d84bc8ebb8233685a76ac
font_01_sfnt_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 10912 bytes
SHA-256: 806d966f94d8579aa8c306103088f492cd50901b0882519b2c55f3611cc95b99

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