Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1b61f06e2b242a…

MALICIOUS

PDF

92.9 KB Created: 2021-08-25 13:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 39a46aa0ec942fb92a73a9b3283b1bd4 SHA-1: 41ed4e85b400ef710a0e913beacf7a238b653d15 SHA-256: 0d1b61f06e2b242ad157b1ed9422d7f4a6e48a0fb78e9116f9321357a798de9e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the link farm structure is a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898c152fac7---renatujini.pdf In PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/54de90a4d29a807d3294004e609a48b3/fufogok.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3ae730980---92498743832.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/93286318131.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610318305c591---zafazaxonawewo.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/59c89t092a06jfunaa6gclpue4/bejasobem.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/sadotununivo.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/1dbdd8cc30bc58f3e6783f6fbff23efc/fatutu.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ea382cde4638a23f1495d8f313ee8921/62555042849.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c1a69067---tomawugimegeloxafu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5ad0c388---zozifafojulomikow.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16104d51045b29---32643864953.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/bebuxibesuzugazuz.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4fbbb004---pizowumipobeb.pdfIn PDF document text
    • https://samavetah.com/ckfinder/userfiles/files/69332174429.pdfIn PDF document text
    • http://sgpeo.pl/users//file/20472523883.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/6ba0e0b9de5b545856f272c7f5b138a4/mavibovuserexonolifojiju.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/58462616485.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc2838809---bovobexotusobamivas.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/pofesuvesatedalowuk.pdfIn PDF document text
    • https://steammining.com/userfiles/file/disugefurawojijodalixov.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/66736422854.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/jikit.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/67831je2onafscjsords0tkt2g/mubukekusiparara.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/b51avm1nq253an1d4h7ncf73s1/bitenasozabuzadut.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/e6124b11dec3cee5d2d6621404885306/86519599367.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=convert+drm+kindle+to+pdfPDF 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_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 17580 bytes
SHA-256: b4087aa502aeb8bf7c632f8e9ab8812f19c882e1aea9095a1a04a91aa680086f
font_01_sfnt_off00013577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13577 10520 bytes
SHA-256: dc3318fb101f21c38aaac160582ea229841d2d307b03fb41a67813c2c0014315
font_02_sfnt_off00014d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1