Malicious PDF — malware analysis report

Static analysis result for SHA-256 362ff5ac2a10869b…

MALICIOUS

PDF

105.0 KB Created: 2021-08-02 07:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f1d4e6e74cf168bdb0d7991c71062db5 SHA-1: 95e75d284e07dde0ff93f38913e2c3d3fdb78904 SHA-256: 362ff5ac2a10869b08ba81cc7b4c323eb00cc740baa88c4e667601a829e21e0c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple distinct hosts, some of which are compromised WordPress sites. The embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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
  • 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://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/klilmkrqj71g4amok7nbm0b7mi/mebowogezojal.pdf In PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/47760082272.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748baf202fd---86616457500.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/15285729389.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949689e7e54---tadawozete.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/xamatesa.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/25679632101.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/18b6522e711e1ffec33441b3103941df/nowoneremubet.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/66716638779.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/giledilun.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/perinaxogozute.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/63438156632.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160cc79bb48359---nojovexikajuraf.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/a91e5694c303cef661b3465a6e253102/vupakaluxokafivalepiviran.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b382c6d4743---rigumukitafenija.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/7e38253957b526f7f5b81c72ef4c49ae/85369408811.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160848ce3345b7---fejenotavi.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/sesusof.pdfIn PDF document text
    • https://appfacile.it/file/22967570843.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160829fa1c19d3---57797265874.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/noweziperuduk.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0d5333c83---83835807388.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/283de144aaa0a0b91a7644d84acd7230/62653116536.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/75de77d35a78f7c68c1e996df12ca58d/60396620793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=rugby+io+ball+mayhem+unblockedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11561 10944 bytes
SHA-256: c4ed50debf24edcb9e9b320b906df9e5b2c80dd9100607e8566469255608bb93
font_02_sfnt_off00012e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4F 17028 bytes
SHA-256: eed0df7bcc7d34b166c403dcace736e52099a3602c7dc7824622bbce89dbf92c
font_03_sfnt_off00015a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A62 19164 bytes
SHA-256: d512abc655e1ee5f441f80348a2da285b1b52112add0aad78ed61f1f76fb14ab

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