Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb590ef5efb60f5…

MALICIOUS

PDF

79.3 KB Created: 2021-07-05 00:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0c8ae0e125d42c91b0de2f7729a5dee7 SHA-1: 94583e0f52c501bea022d259b80ddce38c826104 SHA-256: 0fb590ef5efb60f566b093d077b42516910be6dc9b35f97c8511087ebdeecac8
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a likely phishing or malware distribution scheme. The PDF structure suggests it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://jbdclothiers.net/emailer/userfiles/file/98682550885.pdf In PDF document text
    • http://sxhk365.com/uploads/file///bebepasudapavu.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/lekuxadokovili.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/80323445837.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0e74749f3---jidawe.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/zemidefozevi.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/furoguwuparazubupu.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/60841336263.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d35f33d2---86564884308.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/93445318415.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97b40a1af5---delox.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/vutezupeluzotefekas.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27b1a9de0---5778443056.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/f60e513adad7d2811b8c3c857eb40a0f/toronixogururofipijizam.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/zazifusunabipe.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbfd3e9106---pejowomegepudeka.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/52976360539.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/mugixodujuji.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/89110546635.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/mi544he3mmsbs6vegpu8atd8ev/suroxile.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da39d5c893---masipodexufikudedopadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=simple+cryptic+crosswordPDF 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_off0000d25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 17284 bytes
SHA-256: 4d7e2c20e2f22c134e3595f5c956c4edd422df8be834a6f3d0176c8f83244740
font_02_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 10684 bytes
SHA-256: a5c32f04086a57b03ebfea3aaa2a57c7fbd1dd269825746c0a6e9f992f1a9730

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