Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6a0150a76dfd41…

MALICIOUS

PDF

85.7 KB Created: 2021-06-10 06:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6de7e319a949673f6f1f8bc703fc2cb4 SHA-1: 1528ef5cb4734744f45d0a53ea4bbd036df14120 SHA-256: 0c6a0150a76dfd412235045528a3d239bb447f9275d1777f55682d3b3fcf8790
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://pixomot.ru/uplcv?utm_term=how+to+find+the+area+of+an+irregular+rectangle
    • http://andlupa.com/userfiles/file/binafelolu.pdf
    • http://amoy-art.com/Upload/file/bibebiguw.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3uict7v9kof7df976h30pqic67/lasurabasodirinitokexox.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/p19tkasre0mfdollfa5virptr4/juxegopura.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2dfnehn9ah65gh55fom0o31k26/muwadojuzanatolopirumiza.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7035dfe6---juwuvimekabetaxu.pdf
    • https://olterus.com/contents//files/61184555628.pdf
    • http://wamer.org/userfiles/file/83612743179.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a683978a43d---pisuxum.pdf
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/80583765816.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5206d090efeb6920649397efa5a1f07d/29448413150.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6eac389a---buzarap.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/b7ri16il65aelaevj2c6qpif9q/nenuwivabowimejegiboxa.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb16b68273---mimanipunutunasifojofu.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f001b7d81b---pibaxovodezoguga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed70.bin
783614f49fff6717240f5a004132281e78f24638f1f0ebdb7b9598594498f0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 5040 bytes
font_01_sfnt_off0000fe98.bin
13410ae1b9e56580cae8a9f2d061632e63174627b4cd46faf54983a0062dba02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE98 11740 bytes
font_02_sfnt_off00012634.bin
61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12634 16096 bytes
font_03_sfnt_off00013afd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFD 4324 bytes

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