Malicious PDF — malware analysis report

Static analysis result for SHA-256 727d01cf7f469f14…

MALICIOUS

PDF

83.4 KB Created: 2021-07-13 10:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 780501703908183dacb75dd08ed125db SHA-1: ac68074ee9a5f4b3c83db430728f9e3fca24db51 SHA-256: 727d01cf7f469f14704182e4802b68b95a6a99d94c07682a64ab1801ce5cdad6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to redirect users to malicious or phishing content, a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/m1ba3gu4ndvja6ltap19mffooe/dewedafekafebifofalideb.pdf In PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/aec732c933bcf7d87e08bcf7d090d4a1/9297269086.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16087562042a9d---lovixikezumufexa.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/63726321810.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc30431054---47352870454.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/2383713893.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/xejonazibepepa.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/71594803872.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/85383808687.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/gojedefiwisozibupamuzari.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a729eaedb8c---13205756928.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a9567f647e8---wizufizugurojaxara.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e2244dc5---96871300396.pdfIn PDF document text
    • https://citytrafik.nu/images/file/wolegevisomijakebimabupu.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/32825644766.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/1242687471.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/gipogowu.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/zubufukisivifer.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacd573552---20233118093.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/r0vcfv5h7sko906732crepcn9a/16551447747.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/wojililijo.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/46362168584.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/reduboni.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/ximivupilajiwixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=riddles+for+7+year+oldsPDF 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_off0000e60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 10356 bytes
SHA-256: 458fc237a551a522b7d525e1d5ce9ce464b550e2dd748f89ea94e640a0b2eea8
font_02_sfnt_off000115ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AC 16496 bytes
SHA-256: b3eb151feff9be11b703a20edcc845b7ce3cce520e85b7e5026a63c3e1edce1d