Malicious PDF — malware analysis report

Static analysis result for SHA-256 348a81387202dab7…

MALICIOUS

PDF

198.2 KB Created: 2021-07-03 02:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 267aa813fc74d2deca083c9e7c22bf6e SHA-1: 2803c04246b4845cf6a5b2e04c7d70650f1e6c65 SHA-256: 348a81387202dab72830eac865283b95a9b6b2ebe26409b6ec58b13c0666a812
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's part of a phishing campaign. The presence of embedded URLs and the nature of the heuristics indicate the document is likely intended to trick users into downloading a second-stage payload, possibly via a JavaScript exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/31e9aca7c42fcf909521149c92186ebb/1458715621.pdf In PDF document text
    • http://jshtextile.com/UserFiles/file///sasugadesux.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087debca098c---33145344216.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/42875782344.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1e48915c3---gaver.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c79b5094fd4---51343907451.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b80eb7b0530---80862501582.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/foboxanutokuzusata.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/fusurekotali.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/xagiba.pdfIn PDF document text
    • https://semut73.com/contents//files/rexapad.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9cceb1bb5---36282468599.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb0a542ec---xovujovexizeboregokuberiv.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/viruvorenagimago.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071979b270e9---xelemezogevutibogubit.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/0o7e8rl7ifkoi5is71v3p765us/79386143832.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ad64a3475---64209107992.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/po1rgvasvn6hunrm8org485753/97666713913.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160716e8047f3d---kefefokupowav.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/xokipukotonuxupuvimal.pdfIn PDF document text
    • http://guchenes.com/d/files/29753239771.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/60567660946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=andrew+bowyer+farrierPDF 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_off0002aa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA85 10356 bytes
SHA-256: d3d84151297fe1be53aac781b3c77cf35eb46d5737af37fc4d642395e82c9ac4
font_01_sfnt_off0002c216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002da28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA28 17968 bytes
SHA-256: aed976efc5f1b878edde8f6cbd590b238866cc4986af19e01577f3a736a376fc