Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d409a629e46aa35…

MALICIOUS

PDF

85.4 KB Created: 2021-07-05 00:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3f16c3f3bd5040bbe2bdd935e7b870cc SHA-1: a4efc861f5191854b89dedac90af5e36c4c4092a SHA-256: 9d409a629e46aa35c17a09d4c0e7bdde22a3ec923c34b864dca22cb8938040e7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The sample contains a link farm hosted on compromised WordPress sites, designed to redirect users to various PDF files, likely for phishing or malware distribution. The presence of multiple external URIs and compromised CMS upload links strongly suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/02b5fe97d9d99a5a41785c064c301a48/noriza.pdf In PDF document text
    • https://greenfuturevietnam.com/Upload/files/92726895855.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cd6a9be43620de3e3ace8d0a62bbf001/wizikoletepakofibetuja.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/naqbhbmmck2qq5div5a7at8lfq/90089797410.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5c9f79fa3---pumawamevunopefi.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/68649733518.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608a16088aeee---godenulusogodepepofale.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f7d60887---womorekuloj.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/db38df576b0e66a69ab0c7bb88349ec4/62956861178.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/94947359422.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/n58hve6ciiuftvfh7nqp5vqdtt/digogelovoxiru.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/gowitapotugezovexum.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/11255cea7d3f63255c6ec3aa96e8b1d6/zejubipomuburidevevivedi.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/61466087405.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ciummic3bt9kovv1fmbdsv87pm/pofigatirenefar.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/6f1ee386f75b463acf77ae7782fad130/zizexevoladoboni.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086e75bce943---nemami.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/nologotibukizezazagosa.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7df29ffc2---63718487018.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3a96cbd2---wakudugakinu.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b6b668708bf4961bc8adf06c1b49fc5b/69084993526.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/55440547243.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075f62bed465---fonilosuzesokipamur.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/db44a5c93c995df63b2b469bcc53a5a5/79355475738.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/tonisikegasonijakerekatab.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/hkslbvmrmjptqdbcbdcvcbd7q0/tubagaxevumarul.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/35256803671.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b2940534e---xukupefidumex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=relative+minor+chordsPDF 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_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10744 bytes
SHA-256: dd7616a9cd224a57a4a5596d480801f15c97e96d0e28ec97c61c3fc002cad50c
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 16532 bytes
SHA-256: dd286fb992942e1ed78a021b3e0d30dcb52f708e450afa65dd43514426c98d60
font_02_sfnt_off0001303e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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