Malicious PDF — malware analysis report

Static analysis result for SHA-256 f713653e34961e1c…

MALICIOUS

PDF

93.4 KB Created: 2021-07-03 18:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6985e141a5ad8ece1ab2d96894582f15 SHA-1: bb238bfe8dc5d5d7220bdab7cbb45af79a5d840e SHA-256: f713653e34961e1c7a66ce96d646cba5eeb878e537d240d27d219730500a9729
296 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials T1056.004 Web Credentials

This PDF document exhibits multiple high-risk heuristics indicating a phishing lure. It specifically targets recovery secrets or MFA confirmation, suggesting an attempt to harvest credentials or session tokens. The presence of numerous embedded URLs pointing to potentially compromised or disposable hosting further supports a phishing campaign. No scripts were extracted, but the document's structure and heuristics strongly indicate a credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 9

  • 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.
  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://quadocdao.vn/uploads/files/walukomisudofegilosomus.pdf
    • http://benhvienlaptop.biz/userfiles/file/wovalabomanagerajaduzox.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af586e0ba9---kujamefadefomajedezu.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e366073b1e---mefajadojiveze.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/9ac41e23cb914a591048c40a8e325b9c/70022070792.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/23495083385.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b90f2b1c28a---patilugolibovonivol.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d01d76e18ba---95490457375.pdf
    • https://aprilboya.com/userfiles/file/zanatunikino.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/baf85d58c6b44f22bfa9a7f5c972bb37/kowadikobep.pdf
    • http://promador.pl/userfiles/file/wisebugivobapopiken.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d7afc52ae40a58777d851db1f1d62919/posulojowexe.pdf
    • http://littlepearlbooks.in/data/eimages/file/jorana.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/f7fb2dbeec53fc27049832ed3ed62902/fenuwevov.pdf
    • https://termoformat.md/img/files/visar.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/oga8vu8rok5l0qa89hqqdpepbu/20941355581.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/99f30d1fa820c3864f9126e26bd389e3/sewibajuzewonarev.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27d48823ea---39747603073.pdf
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/30usc8si3r2f9mcpl1unq2uge7/80759324497.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f166564e99---tibikomekuriritorozo.pdf
    • http://agendatourvietnam.com/hinhanh/file/24187368873.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/7caf8bf7ca03f428ab1e825f54b1e3c3/59260196610.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d3b33247242cf3f31c7d1395638b6b36/diwelil.pdf
    • https://yalcinplayer.com/calisma2/files/uploads/sukafisugejawezos.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/19180801233.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=steam+mobile+guard+new+phone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 16792 bytes
font_01_sfnt_off00010ddc.bin
a53f79bb3cbf0a6b917fd245e8f065590012a83faae12cfe65bdf6e73e294c56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 11072 bytes
font_02_sfnt_off00012707.bin
0d33267ea93d7c0f3cd8e8a1e2fa65bf2f10d5b1e8afd43a973b179f0c4e6884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12707 16828 bytes
font_03_sfnt_off000152d4.bin
0e3d63f173342003c62a86c726d4d5a85e7f52d44cf06618766a4fa08a0866bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152D4 16088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.