Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5decd8ffac74f2…

MALICIOUS

PDF

90.5 KB Created: 2021-06-25 22:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c1c7367390b660ef30d470c6fd4ec82d SHA-1: 3750ba4e886130e6c76778bae953064c11ae7803 SHA-256: ed5decd8ffac74f27eacf515bc2c448c2125ca88c0eaf0e1479926cba6d499f2
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or lead users to phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/83583e18f68134da1b1b9fe7530bfadf/93401309251.pdf In PDF document text
    • http://bayanairag.com/uploads/userfiles/files/68075466378.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e8db6cc7a---74347126697.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aaee9ea46---26658135011.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/a24c905af8e799d1850efcd99a8d6397/50947437373.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/e98j8t7eq9q2q97peqa3v9p288/23582885753.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e46fe25c6---13982788106.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/sebusilogatimuris.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d7ecdcc8c0e6a96f1e79bdf224762220/poparaketaguwego.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/16330074494.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8c129b9e54b9d9f879e6c4f5b5d0250d/90935315404.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/sizowa.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/brfn0m43onnk6ijfpupt04siet/82907609457.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/40324890464.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ed98d09643eeddc1e68936cb0517a254/bupimejadapilotusupex.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/e9cce3377e1ef4dbd71ff7ec9cf4dc52/83988736970.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b36c8df18---96270671264.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/33671758072.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f51751954---84015195399.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607a25bddd816---mezenemurosekal.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/48232848610.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19872168251.pdfIn PDF document text
    • http://drironcat.com/images/file/lixogamemitenavu.pdfIn PDF document text
    • https://efnnma.org/files/file/ladituzufozuzuvotupoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=thanks+for+your+concern+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 16776 bytes
SHA-256: e89b20b3f233b5f23894ecf47929a13b23f75857f8ace609afa651b5e92325a3
font_02_sfnt_off00014376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14376 10908 bytes
SHA-256: 8ef3cc75032ec4daca8c2718cb3c2bb29e8b6496d20dbe280b485d03588c9993

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