Malicious PDF — malware analysis report

Static analysis result for SHA-256 03941352b7f21fd7…

MALICIOUS

PDF

107.7 KB Created: 2021-07-01 23:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 092a378b4aaeecef814d32944089168a SHA-1: cf37b5fc4924c152fe517a07b68944c120fa086c SHA-256: 03941352b7f21fd7428484621fc7a23d9f7165014f48e8a545521a8a30e2dce2
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 http://bygreenpure.com/userfiles/file/gupowugir.pdf In PDF document text
    • https://groupunsur1.com/contents//files/77839666096.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae1b7540d---zavojunoberufawib.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ae52f85dc9d8b730169ab48170295f92/litunetaxefumuropofavul.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/33451dcb2a6ba3377ab36864fd075b8b/77500776.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/bijofux.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/2240980c8f3f1ec8995d6a90098d1158/bemefi.pdfIn PDF document text
    • https://tidaksusah.com/contents//files/53975041638.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0f3e32ec1b6c77f45148cf656d622db4/84746180331.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6843652fa---wizunupagediwuza.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072040646315---46629599581.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8294c3f9d---xegofuxi.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jlnh69fhp1cb0664vak0536rl0/niromerusinote.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf09639d048---mefewekuvuliluwajoxaluw.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/57869348573.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/6726804446.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad0aec2f8a---nonagubevokamegadupi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b86731df51a---bokuxofafosimixefuliba.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/80832469233.pdfIn PDF document text
    • http://prosquash.by/data/44244960405.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/62280354330.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/23627457853.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/vvbpqlojp36cvu7ug3tbbb776b/96770664898.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/dc3a297846feb6e7c8053d82f3b88e08/11938821422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=artist+body+referencePDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/59804927831.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 16508 bytes
SHA-256: f0d76e5a74b5550bbc90995f57d904388b6bc08c16e1b6e32116d810ad1e4369
font_01_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15052 10496 bytes
SHA-256: 134d93763784249683cb7633b089cacd6c51ff3081d6e70beef73f864b6641b0
font_03_sfnt_off0001685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1685A 18028 bytes
SHA-256: 245e699263f34080bdd5cc2b24073102a5465dea7e320b34fd4876b5347d36cd
font_04_sfnt_off00019849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19849 1772 bytes
SHA-256: 172309685fe98285604e713d49568994867313c34855d65ac26f2a3d6e9690f4

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