Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a99596ff51fd55…

MALICIOUS

PDF

91.6 KB Created: 2021-07-28 10:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 8f791360b2b3ea7b1633afa2e6c1ebec SHA-1: 3ab634fb8c6fa31dd701eb563b0441d38ffd041e SHA-256: c8a99596ff51fd559945571aaadf5a7cdd6eb6b87aedaf29aaf7f3ed89dc2767
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6eeb9c065---71051785666.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b19aa1cea---42552484859.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/e095f4dd86afb6170cadc36e1ecc65e2/48557926021.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/11758986650.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0b1d56fe69aaf9c18bdb5cd5335e6a84/73559228367.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/78401776426.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/gomizefodogek.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1cd05318---29099655679.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b134abeb2e---82519008864.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/jagokemevimimag.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/2hn31dm43i8j8b0ak2cd4l8kn0/63967462000.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a41a2481013---21362957753.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff3d112480---pekamaferefegapisevux.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b60a46259e---fisexe.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/6767146363.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f69b68c60---5469740477.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///42287764112.pdfIn PDF document text
    • http://inglewood1968.com/clients/68690/File/167487371.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/03c37d3c2125e9961ce731cb601cdb7e/rojuzefezugutosufap.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/70884708328.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/dc0087f7f01f399c9916a986771108f1/70070628509.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/eauv6q8e9s8d8sair2ulvcpqr6/zexom.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/2q8h2ablbiavp49mlgvj984mf7/98898284068.pdfIn PDF document text
    • https://steammining.com/userfiles/file/jejumopakasenojatawasezoj.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/pilopemexugunulesepi.pdfIn PDF document text
    • https://castel.ro/userfiles/file/tofavesidubemitasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=what+documents+needed+for+california+real+idPDF 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_off000101be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BE 17096 bytes
SHA-256: 2d34cb0eb86cc254d00e933cda5aa9a32bbea719bff4870d1186525e39290639
font_01_sfnt_off00012ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC0 10836 bytes
SHA-256: 9c3f069d93448c638612cf752297514190d67f8fb84526d415de1ae5ebb4f2b6
font_02_sfnt_off0001478d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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