Malicious PDF — malware analysis report

Static analysis result for SHA-256 465922d31f22ca6f…

MALICIOUS

PDF

74.5 KB Created: 2021-09-19 01:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 53f2de97959b4d7473b4c584cc641e6b SHA-1: 61db277c0e8e7907033df16a6c9d9da8b96a64f0 SHA-256: 465922d31f22ca6fd95fdaf9c057607bebb56495fdf7cba34db45e0cae72cdf9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nissanotogovap.net/uploads/images/files/povugisofagede.pdf In PDF document text
    • https://dadesigning.com/daduserfiles/files/dabovevedu.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/wazojinumiluwiwafisovejet.pdfIn PDF document text
    • http://salwex.hu/file/60852253408.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/gufowomebavedataravib.pdfIn PDF document text
    • http://willbramephotography.com/wamuselages.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/38029944428.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab3e73da6f---pawedubite.pdfIn PDF document text
    • http://amandamaitland.com/images/file/64583216488.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/95072318329.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/33380714404.pdfIn PDF document text
    • https://dacola.com/upload/files/45395851010.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16145cbb45d0b3---62956170767.pdfIn PDF document text
    • http://ndfeef.com/radiant/mechimobiles/userfiles/files/4189860092.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/jaxadajazefosimavasus.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/3035818620.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/pozen.pdfIn PDF document text
    • http://ateliergermain.org/sites/default/files/file/86957892128.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/lafaweronanosor.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613067948fc68---44164884565.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/98904080515.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/vojowovaxomijamubu.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/5176935700.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=wordly+wise+7+answer+keyPDF 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_off0000be9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9F 17428 bytes
SHA-256: ca40cd4f1ae0c734ee7ffbee8adec5b9e4e3a7de4e7a2d382d77ff15c5087245
font_01_sfnt_off0000ec6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 10480 bytes
SHA-256: 43452d5cd1ade2e948d591f14fde261a115736834efe035d9bc97ec011881436

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