Malicious PDF — malware analysis report

Static analysis result for SHA-256 f312494fb1163275…

MALICIOUS

PDF

76.8 KB Created: 2021-06-30 11:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ee151249d586cab91e0eec44b32a567b SHA-1: f8e910899700ad8075cf221d967a53e17e3f5258 SHA-256: f312494fb1163275e0b99c75b4f2457c10ee7b36691f07793c62a0e3ecd4d3d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely leveraging a PDF exploit to execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laborke.ru/uplcv?utm_term=jobs+that+are+easy+to+get+and+pay+well PDF link annotation
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4465bc36---24541312714.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160928d50459da---rufawuj.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/6a21541a93a1e37dbcc09afb7c9af6f7/54813964134.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2e9b81192---46114525960.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210614234921.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/96813a32890e52fb5a789719b1da3509/veloxifidopunikaki.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/miwudukebagu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9ab353999fb4b84d70f7e333cff0d3a3/xininesenawaxomokerer.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/f2uh539sv9hbd231cvcjaj3l95/gagifevojodilobi.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070afc3ce792---zosufefap.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/42892461905.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/25eakj3116mbe8o2opppgsv692/57462343275.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/bimoberorux.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdff4b12b9e---vimuguzibuwikefazogub.pdfIn PDF document text
    • https://scalper.ir/data/files/file/vikemufotipe.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/79839242086.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/jusin.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/kozisipabijazinunedure.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1904828960cd3c73302b1.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/kikokam.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/nikijejak.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2c26054f3---xovirixapenojotimet.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/13629467777.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC888 10912 bytes
SHA-256: aa03085cdd9f0d6328a8605328d818173e4b6f4bd09d35a786234e5c05c64a6f
font_01_sfnt_off0000e172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE172 16544 bytes
SHA-256: 35b93d3a1ca8899c218d2966cccfa8dfcba40a5bb7d19e25eddd5b583bc6b3a4
font_02_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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