Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47f92a32c42d90f…

MALICIOUS

PDF

76.7 KB Created: 2021-09-05 03:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 650dfd11a29cfa1cec56a6f37751cf78 SHA-1: baecfbe976956c6c75e05af6265226ee48c69e18 SHA-256: e47f92a32c42d90f3c18b0b074cca0c5faa9b9a2c0d2415822e8185dd134e7ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://coretry.ru/uplcv?utm_term=nitro+pdf+to+excel+review PDF link annotation
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbc15cd8dd---3080231361.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/lozajekovurag.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160caea8098955---menivenow.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/26986817421.pdfIn PDF document text
    • http://live-net.it/file/mafedisira.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb2bb6189---40293572144.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/87897415628.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/d69e796ffcfe82d047cc04cda7fa8aef/80339498498.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/34583622072.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15e7d73247---68166278539.pdfIn PDF document text
    • https://beaszemin.com/files/fekirinevejoginapikemek.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/47553939699.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e378cbb36a---16216042159.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/fs8mbhnk8bckpn27kti55g8041/wurimapezuvala.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/ab9e2284fe3d540a2a2a55308a22e0b3/sosodedidubowinesapepad.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5f10a9e1e6854b38f595223021c5dbf2/jazipijarexenizeseb.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430105204473831.pdfIn PDF document text
    • https://airshow-bg.com/file/fazidatuxifuli.pdfIn PDF document text
    • http://beiks.info/public/file/65205416665.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb009c9936---79088198587.pdfIn PDF document text
    • https://ever-progress.com/upload/files/8525947884.pdfIn PDF document text
    • https://fultoys.com/userfiles/56698338132.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///34064171097.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/rekizapunorozulamosevibi.pdfIn PDF document text
    • 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_off0000c765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 17812 bytes
SHA-256: b6ab89bbdd8be7b63400b237faf7314843d4f2385713996bccbe32a6d65baffb
font_01_sfnt_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 10412 bytes
SHA-256: 67989cc485115ace47f378793fe5012928edabeb2296962918bca0355351ccf4

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