Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b595ac26230830…

MALICIOUS

PDF

225.3 KB Created: 2021-06-26 19:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aadfa898982fa9a56a7cdb48f7897351 SHA-1: 0443f2feda2fcdb724bedf1c3acac3e8748cd5b9 SHA-256: 88b595ac26230830f289ed1397d9cce32c56256ec9603c71f84259db76f2cd16
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links pointing to compromised WordPress sites, likely intended to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URI heuristics suggest it's designed to trick users into downloading additional malicious files, potentially via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fde1ed479---tumudiwovegaselu.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f583c2aa1a---1903173499.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16090af2a24e4a---melis.pdf
    • http://bestbuyfromindia.com/userfiles/file/tixemifikopedijuponunusof.pdf
    • https://boyanbolyarski.com/userfiles/file/fupusikegijodawowapus.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/790b64d78d30262fd2270c0e75343b04/bikapijagekofodonope.pdf
    • http://soflocops.com/clients/67403/File/20098256195.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e06723f0223ff9b293a33d4ffc28ebf6/sebejunibolamonozemo.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb54a52200---83826801648.pdf
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/cb0c1fbd83f0a88ee58fa678cc864172/sogofalazufilixevapobi.pdf
    • http://al-bandak.com/userfiles/file/63397606112.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807809ea79a---pogaxegalutawefegul.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da520675f5---romefeziwexavuja.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/e6cfd6f74f819e4959b98b78be1f5eb9/41072492844.pdf
    • https://alakharia.com/public_html/userfiles/file/54488545220.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/m47dlgtc0l91n85fj0rhat6jln/31384495697.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45875dbc35---40906679694.pdf
    • http://broorybulldogs.com/clients/33993/File/lowunumobalisefamaba.pdf
    • https://hometeamcorp.com/images/usr/vamugekajadas.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a47aff891e7---nenefozobekaj.pdf
    • http://westernstudioservice.com/admin/userfiles/file/gobojeb.pdf
    • http://slp70.com/clients/873855/File/galivewedogasizapodano.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac991d1bdb5---94101591377.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a4dd91488a0bfffe68a02d7bd56cc5e0/99586498179.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cleopatra+the+great
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003074c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3074C 16792 bytes
font_01_sfnt_off00031f63.bin
083310b6b1cc62c18f5b1d0201ff11a27471c3d05529a036bd99288fd2de0ec4
pdf-font-stream PDF embedded font (sfnt) at offset 0x31F63 10200 bytes
font_02_sfnt_off0003366c.bin
8f624643b0af25d600e4b8791e0baec118f97bcc09fc9d4dcd074235138e9b1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x3366C 26492 bytes