Malicious PDF — malware analysis report

Static analysis result for SHA-256 db598461b20316be…

MALICIOUS

PDF

83.8 KB Created: 2021-09-08 11:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 51f9388972c79228676359f4f2529ea4 SHA-1: 9be59b979379596185c046b0d3a51fa0d5421edd SHA-256: db598461b20316befd291e0d0ace1efb24082edbdeeba34ec09f869f1a5651f2
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d627069770a---vusixixeramodonobikewolo.pdf In PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/87985753809.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/nuzivagaruzaw.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/juxefugawiwubumi.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021080801433871.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/bofutolobugolejonadetux.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ee77bad4d91c3c9a68ef46f43ee80960/27904190473.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/6ffe5a680ef6359ce95e5580acba3727/18598644378.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/7724657846.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/mizoditutegejuxi.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/malen.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/bc0e0900bdc7b4382148d60cc9a8a486/23772227951.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f88e31e51d---besokujofe.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/24173892766.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19576265f0---99676993178.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/jogutiwajidaluxukezekotu.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/0b4c448d6ed9011581ad5b57058bed6b/fupegomuwanetisinomepami.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210611124553.pdfIn PDF document text
    • https://wsbtitan.com/images/file/gukugefenozulumovezewax.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/8eb3109f661bee46d32a5f63787c0552/93955800465.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i7cvcqg1vnvo5h31h25udnr2e7/zobato.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/13316956123.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/pibagunuzumebupuzenaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=diedrico+directo+tomo+1+vicente+gimenez+peris+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_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 20268 bytes
SHA-256: 2e4dcc2933be5766256f78e20cb15d4095a4e0dd9553a1d121b061c9f9048343
font_02_sfnt_off0001263a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263A 10932 bytes
SHA-256: 3990bb41036fc44821cc5392cb75c24618cfed34930d201c3feee5a84cb83e52

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