Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca9c807a27e8752…

MALICIOUS

PDF

86.2 KB Created: 2021-07-03 07:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7961b82015b1cfe911d4ae1f63de557c SHA-1: 8fb4caceb7d24e417f1f9855b9f28ace695ffff7 SHA-256: eca9c807a27e8752b1c96bb5625a3be4ccca64825172e79b4eb9f99293566c7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to external websites hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are part of a tactic to manipulate search engine results or distribute malicious content through seemingly legitimate but compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a09480928ea---sulomugojefin.pdf In PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f59fbdf906---polijinudonerav.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/f6d021a6770a575b9a91bd5ad7f1e7be/lajovotutojalelimajefub.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/jojiwexefanexetagutagikik.pdfIn PDF document text
    • https://kopari.hu/files/file/sivifopek.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/g61aph2gudnnaksdo1547h2l64/40225863562.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/sebuperoloz.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c256fb85b32---duwipen.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69145984571.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/351ad6880343673a893a01a480f314e2/wudozibakudotel.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16081eb504f848---7214913114.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/rizozudugojudef.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/jobona.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/jejegivojajimo.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ed05fc51d31b08ad8fa17e299bd41da5/bikewe.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/liwuzulup.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/d8b79a6f159e08c8921569609f449505/90421648944.pdfIn PDF document text
    • https://magerp.org/upload/files/69995389536.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/gegvgf0v7pg6ci7e1hduj6jtgk/tuvamazipotuw.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21916366f2---zesub.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/aa958e6ecdaeca7a9f168b3ff8b914d2/kumeza.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/lixuwuwabudezinobajeket.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/kutakarivuzezuzajob.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607be9fb76ef7---19753921123.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160d684ab0b30b---pojofuzitujozosaja.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7ee0bc111---pisedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=meaning+of+treaclyPDF 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_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 10448 bytes
SHA-256: 8b8da08705f3e16c8abd692b50ff662f287c222468d4291fb1c1e9a519a439b0
font_01_sfnt_off000102d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D9 18712 bytes
SHA-256: 31002afd126e6ab01a2d5076ab0d5ec01a5a92dfa6f4fc653adc30e968d6e080
font_02_sfnt_off0001320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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