Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d04d4f59eae2de…

MALICIOUS

PDF

91.8 KB Created: 2021-07-05 00:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3cc60498d0b7e2a489fb7cdfa5e0411 SHA-1: 83a3638dccd608e491bdb3d85af190398202a7a5 SHA-256: 61d04d4f59eae2de75dcc2532636c60fece543361eab945a8a09555a87028573
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf8805e265---poludibonodefe.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d815aa83e96e53e70cda8e9bf154b3ed/79478384823.pdf
    • http://maasmartcity.com/userfiles/file/kedeziru.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/1f9b6db1011b80e04cb6e5890b969b4c/lejipuwugodaw.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/tisitevurinexenupukawapim.pdf
    • http://pritchardreunion.com/clients/81409/File/66664255583.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/kisowabakogimupulofef.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/5bf4c8d80e04682b31293c1090573b30/21869985326.pdf
    • http://capmar.eu/userfiles/file/pexakosuluzizegijobasemu.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/pazonelifisi.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160706d57c7669---vosexip.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/5ce5c04c0858514f4e1d207787f160d6/80837352204.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a82da5ed99---6342868385.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ce907k3afptkupc8d0e241b274/penajibegamol.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2b68adf182f6f7dada7473ed55e3efe7/jaxaredojixesamolofuwa.pdf
    • https://digireg.es/upload/toxafirulonaluwawor.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/13396428192.pdf
    • https://caribemed.com/userfiles/file/diwesifovegunopipadovap.pdf
    • http://abwvictory.com/uploads/files/94660471181.pdf
    • http://www.colormotion.cz/UserFiles/file/bakapizonajifa.pdf
    • http://yongqingtech.com/d/files/48847171000.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6dff302f8---17370508701.pdf
    • https://metricgroup.it/uploads/file/42290739058.pdf
    • http://szentimresiklos.hu/upload/file/88939664901.pdf
    • http://paillasse.hu/userfiles/file/tovuninatefokaduzuvixavob.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=scout+packing+list
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010342.bin
6ba8de83a1f09ccde6eb229fc82e1b3bbf1671899915c633dcd742d6f668a3b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 17832 bytes
font_01_sfnt_off00013205.bin
fb72aa0ebe211dac715de0d84e4249a4a9e70bfaf8da7589f5a26d939fcf818d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 10584 bytes
font_02_sfnt_off00014a53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A53 16792 bytes