Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0f38d5f43a2506…

MALICIOUS

PDF

125.8 KB Created: 2021-06-25 22:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1eb825b2153a862df077cb871fc9f4a2 SHA-1: 4772ac54964365b337f487e627313cac48135042 SHA-256: 4e0f38d5f43a2506b017a07b5bc54ade736449024b6a571196d24a03d1a50513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/20d1dbccd4578bbe651adb25965623e2/80109831581.pdf In PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd0098d467---26635427879.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/3385695029.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/10ff3b6c6239ab98ad5778b24de07d35/sevupumamoxox.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc94b94aa7d---xobogivomifipitekuteku.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/c42e8d7edc98936ec9ee7d4b8e364258/16392164393.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090470a234d8---22963402304.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091708a3b460---sigakarulotovuxerub.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/48547507427.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/feee111de045f86a770651fef83f0ebb/10975563089.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/jazum.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/menuverudibiwubu.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/40384930980.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c269ae6b3c7---vetevurep.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f22bacf7---tanik.pdfIn PDF document text
    • https://aspirans.com/files/file/60177636073.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/k60a4gg38njmstm9al3u9env9q/32167785891.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/nlq82dica8316h1ttlqqnqa8md/wivowafelegobisogazekoviv.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/diximefife.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098e0b78aced---jenofow.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/8ea1757003a2d3f82d7208ebc8c8b869/mesafegejumis.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3486e63804312df87ed20a6046ef26c2/nuduziliteduvumugobotibug.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/sisuvux.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2e0a806c2046ae405409035e1fdf69d8/65766238687.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/kuzizaziz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=educational+establishment+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001b224.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B224 31176 bytes
SHA-256: 0a0280a27246e061307b6385b46891432811b28340f723aa7d87432f7cc0fa2f
font_00_sfnt_off000150d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D1 10940 bytes
SHA-256: b427cf1a8c779953602367d5f84b5c4e1cabffa779f1377317c4a04d3dbfceb1
font_01_sfnt_off000169ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169BA 18596 bytes
SHA-256: 111699a8284f26e505cdbfabfd8c8d631cf57b12ceaa43bb55699ddf38054087
font_02_sfnt_off00019a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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