Malicious PDF — malware analysis report

Static analysis result for SHA-256 5247305fcae22ab4…

MALICIOUS

PDF

114.8 KB Created: 2021-07-06 23:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c8f38c5bd07620811cb4ec7ce70587fd SHA-1: 0447900f23076db907c890fb68117207779e1b8c SHA-256: 5247305fcae22ab4450ca896de98b2df14533ac173f53714bca63a98b5ff66f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination, likely a phishing page or a malware download. The ClamAV detection and ML classifier strongly indicate malicious intent, with the document likely serving as a lure to initiate a phishing attack or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/p6v728e52qhv7ieuca0p2811d3/6790884975.pdf In PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f99e8a35fdcebd5b633d45eb27876c82/timuwopuwaleg.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/63515327947.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835015e3ec9---pejofesaxigowisapi.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/66795809644.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/rd2vs81j6q6eco02i8gj92po47/kiwarel.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/merc0p8n7mdjmb7qtl2lbsil8r/77890655901.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904c1a15fcd---33166825377.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/85054059181.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eccf01606a---12712423596.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33dfc96acc---34296940875.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/gebovoruxemiwumorak.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb19cfe8ae7---tatarepaliworiwetotepivos.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/fd125a7d27b36897ac13c532703a6feb/38106610478.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/vimilivisagud.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/8b452aa32f41ea4c10596832abcce444/femerixanenedev.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/dopunk0tjpgbm9n5j9efmtpv67/vekol.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/nofonusebuweropugemezitu.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/17080510607.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf3ccf566---75978023347.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/bazojomafiti.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/163a857da9a611ecdc908af74d71858f/vorixedogosudulaxojasanef.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ed3b3d4fe60f48d2e426df6bd3f8866f/bifotu.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/75645985255.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45febacf73---zumiladete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=r+programming+language+for+data+sciencePDF 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_off000159e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E6 18184 bytes
SHA-256: 941755b88a1165a1b416e1603e9f38904934907cebe788f3e820ae8d81a3daf8
font_01_sfnt_off00018a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A250 11108 bytes
SHA-256: b52cce8c29bf0204a1f82cb9923b9e8e725faa8c326eb9d6e0679e05743609f7

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