Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09bf6635f3ca29f…

MALICIOUS

PDF

83.8 KB Created: 2021-08-19 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3cf8f874a6302d77032d28c84ccc294e SHA-1: c5bcf608d82f4206e8768adab0daf64b007b6940 SHA-256: e09bf6635f3ca29f044975882ec3723c7aa92f79d8dbf9f2bad3843707faa676
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/54198e582094f5c54140417d9ec941ca/zilexopi.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0ffeade2c4e9608d17cbe91e6b837ff6/65579733660.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/30220f3f931462f87aaf80af760d0998/nifuduzisadisuj.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/sudifiv.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/bf50c211d5b361e13cf07a172cb2ff6a/tamulakivawo.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609934c48c94d---talok.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/50706187718.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845f2038a8c---99615272675.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075e3a79c6f5---lasojowulovipilebunot.pdfIn PDF document text
    • https://bnovum.hu/downloads/890635890.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/livogi.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/gajinutuvurov.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/85808400865.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098cc45a18e9---96115928152.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/gopera.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/zonugoxadikomakesajitejen.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/95615441705.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/84724977280.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/15680579588.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2dd0353ea---zivasegawoxijogagevumajig.pdfIn PDF document text
    • https://emmaushuis.org/pages/16163869102.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/63913769265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=tarjeta+de+cumplea%C3%B1os+a+una+amiga+cristianaPDF 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_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 17192 bytes
SHA-256: 89f88094e9981dff5f6aaf14ccf073770b92d043cb0bb21a67508ce652030f5d
font_01_sfnt_off00010c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 11256 bytes
SHA-256: 9ea418cdc7d5819f6aea846c1f394541f7b3e88830b9f2bb83027055b7383d3c
font_02_sfnt_off0001263c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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