Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22b08b32bdf39d4…

MALICIOUS

PDF

81.0 KB Created: 2021-09-05 04:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6ff3eba50e2f68097acfe3d33eea0f6a SHA-1: 47b03be58660b0267763d1b58a14f235c8aa8097 SHA-256: b22b08b32bdf39d4406761115dc3d5ec488d24adb78d012ed76afcd692c7b836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=free+addition+to+20+worksheets+with+pictures PDF link annotation
    • http://crosswaysrecruitment.com/userfiles/file/20807349200.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/62343408762.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/duzizituwo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ldv8u46eql46efau5np4ebnesd/vomabojatenode.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b89ada6f7f---zadijorewibewarora.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/wafamifur.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/jaxegesi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e544a236706---romosuxezazol.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/niwirejarutefilo.pdfIn PDF document text
    • http://bruntpratcher.com/clients/4/41/419cf983043b9371e8393ecf97d676f7/File/98071054396.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/9013c7e5546d76ac1ec75d5104d7297a/ruwesodujerobamefetifi.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/da0e6c9c0f77da56bddab64ab1555d4a/81229858215.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/lekig.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c79aae7ad---52650706621.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/rukizekas.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/3238940796.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/55003990399.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/zarefatiguzizakonego.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/kurezuw.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/xegizobosibukaxemo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6b69794fa---fidavo.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/2940328992.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_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 11064 bytes
SHA-256: 37951327433fb2cfd7dfa3225b7e77b9e8c106b2ecc2112ef3772019c3a2bc56
font_01_sfnt_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 17604 bytes
SHA-256: 3f6f3c290a83ba359712fe31f17671405a883cfe1a44e11656efc101d51b1a4f

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