Malicious PDF — malware analysis report

Static analysis result for SHA-256 d840f29e13744d79…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 00:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d45259cae723d5769ea03fddd4e1927f SHA-1: 2c7383bd36a755c7213cb5097afce260cc64b16c SHA-256: d840f29e13744d79661143e41a0e51fc7731346a0dd8a808c9229b5b43e76ad0
184 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs pointing to potentially malicious content. The heuristics indicate a link farm on disposable hosting and compromised WordPress uploads, suggesting an attempt to redirect users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ptogel1.com/contents/files/potizosokekoletumab.pdf In PDF document text
    • http://dintainoodle.com/uploads/files/38014113443.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/xebutu.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/visogomevo.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/97162493774.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/jokalejabufewiwod.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/d3b4f6c247524721b9e3ca30f2d0cd3a/38642313201.pdfIn PDF document text
    • https://tipresentoio.it/images/file/gopavutebuniwoxomelojajog.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/73349647733.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/54106179508.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75af05c560---muropalewixodenizapepet.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/xagopegexuzok.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/remelukelalikojalakem.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/sogonigaxefo.pdfIn PDF document text
    • http://tahyuh.com/uploads//files/202108082142412430.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb98c61480---kowavuli.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/40824549236.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d315c62077c95acafabaf76ad6486a32/9137822128.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/53e032a3bce31a3f2af13265537d15db/30616627504.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608270dfdf44c---32357112323.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/73610668659.pdfPDF link annotation
    • https://mintedimages.com/ckfinder/userfiles/files/vijepekok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=personification+is+a+figure+of+speech+thatPDF 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_off0000de38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 18684 bytes
SHA-256: 366b9af5d90315860e76ecef1b04a9663b952935fec6a355ef05ff2b9f6c29c1
font_02_sfnt_off00012720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12720 10812 bytes
SHA-256: 853fe61f8ba1281aa06df0aacd45673c43c51ebaa2516f19790f07b9f2cd4203

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