Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff098d07bd1e4f76…

MALICIOUS

PDF

88.2 KB Created: 2021-08-03 02:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4cba48cef0ae745f9c558ea191f5e7d6 SHA-1: a45121dfb7cc9f367e1b2b9d1cc2f4a24de61e07 SHA-256: ff098d07bd1e4f767ca22983702fdf491da2d808ba66e2306d929bcdd9b86122
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, with multiple URLs designed to mislead users. The embedded URLs and the overall structure suggest an attempt to direct users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://namlongprojects.com/images/uploads/files/342684360.pdf In PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2c39c9e26---36176970832.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0437aebc---73097556935.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/307ea00792ea7e92845174c9d28e4d93/17553500262.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/91247946510.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/gozubojuse.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/15218785175.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/11124779288.pdfIn PDF document text
    • http://mfdesign.hu/files/file/lolurigegawozisowira.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/misoxomima.pdfIn PDF document text
    • http://delshadian.com/public/userfiles/file/95403384840.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/749aq8qqcgi5be32gdaqcgllv2/76680636515.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080b98aa37e1---fevagujabepivuf.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160809b1eee73a---51596889248.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/79377373854.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/90uo57gers7od2ku718m2s1mvk/gudarenevupobaxetajejapa.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/8ef87981d7e2442d046fc7b994b06870/83907571652.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/44026535760.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/5c721b717316b4854964b248bf791aa4/90675286334.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/99522168818.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/ha9r0vtdhf2mj79g86fd9l5li5/66462961067.pdfIn PDF document text
    • https://zold-kommando.hu/files/45861517280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=formula+1+manager+best+strategyPDF 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_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 10740 bytes
SHA-256: acf490a84c93f49fb489a00d8e0543840e2505cc2302b712f8099479afce83f2
font_01_sfnt_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 17072 bytes
SHA-256: 4136e0c02d7404ce436956c264660d6f2c85b56e8f93a54972c04385839ae25d
font_02_sfnt_off000138e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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