Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc46ca2ddc09e2ca…

MALICIOUS

PDF

82.8 KB Created: 2021-09-15 21:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 08614c2a566a3cfc092495207bd5003b SHA-1: a3bead3c375195bfc1f8806e9eb5ef71f697f450 SHA-256: dc46ca2ddc09e2ca836a0e3049ed7bb7dd39c5138796923df0a3d2f5f8e6b193
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs pointing to link farms on disposable hosting, indicating a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into downloading a password-protected archive, likely to bypass security filters. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://b7b.reviewz.eu/app/webroot/files/userfiles/files/78534509329.pdf In PDF document text
    • http://ekopaczka.pl/imgbrama/files/gureloviwalukoso.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/videdufejex.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/32989889612.pdfIn PDF document text
    • https://zzhqhi.com/d/files/renexinodiwatukunorez.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109121733297251.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/dcu6o92oe1iuv4ua8qsenv2qah/30188469993.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3429bb9196437c7a30d6c2cd7c10368b/15080582836.pdfIn PDF document text
    • https://tarsiman.ee/files/file/91440101766.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/duwurowumubi.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/ralolidumemitizipugixofad.pdfIn PDF document text
    • https://unosms.us/userfiles/file/98065666672.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/mopixozivineweze.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/zenosivefolijigufol.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/70885947936.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613998f88b699---lalavenegapugajiwunori.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/ririmalobujodi.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/zazoxuzonebomedumutinef.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/vikeridosasixifufigu.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/27312391916.pdfIn PDF document text
    • http://cybernet-ap.com/UserFiles/File/motolevozukoni.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/75843935545.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/v9dq23232sohaviojv88688ec5/23707260029.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/86962545706.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/23892668479.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=quitar+icono+buzon+de+voz+androidPDF 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_off0000d956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD956 20600 bytes
SHA-256: e267f9d327309fac0db061c74d027fd878d2f9f6f2df2d2e3039b9112a56dbdf
font_01_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12577 10576 bytes
SHA-256: 75241acfb303b4c2e6b55f78415ba4dedf85569c8c3909002290fcde9a5d5a5f

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