Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbb06c6292a7603…

MALICIOUS

PDF

91.4 KB Created: 2021-07-03 05:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba81ad2ff903e004d960ecd1ada05ba7 SHA-1: a5ebd59f981aa13bce7641130f04cd838df24ea5 SHA-256: 3fbb06c6292a7603e791760aa2f6ebfc49d7d85081283c669d9b156baff40883
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of external URIs and compromised CMS upload links suggests an attempt to lure users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=how+long+to+cook+smoked+pork+neck+bones
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f1fce642---12509800331.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9bfac482f---xipimusugegozo.pdf
    • http://doks-films.com/pcms/content/file/56094514718.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa728f6e9---89828818745.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/81359566350.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d20fd9882---96305280202.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/72g16lai1uglpiisd9uu48lih6/kewotiv.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/06cfff0f3d4193f573445ae283fad98a/wolinow.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e2f08105---farutipisidixozako.pdf
    • http://fwullong.com/upfiles/editor/files/vejuxadigeronep.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16074cb5dce7f1---38386554420.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8118d58d2f0d04f41aa2a9e48b27b945/12093357895.pdf
    • https://szekszardportal.hu/userfiles/file/vabalulovatoxunut.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb053c73e---jakunefibokufefomumenib.pdf
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/wozebuvijozamoduwag.pdf
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/politaru.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/7qcjpeovlo3e4jjd1s107irofu/89806310942.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06ec85514---duzesezabajujufuxujulo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82fa35168f---reperaroro.pdf
    • http://crosswaysrecruitment.com/userfiles/file/7738535758.pdf
    • http://ipublicity.cz/data/file/donowibawotakikopurufo.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/cc4d9a05840892c615347e163808222b/95311361208.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16099a57948eb1---12863430680.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/790271f6877173539b241ea16c5d472c/pajilosilarifegesidewale.pdf
    • 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_off000103b0.bin
972fec388170b82e149ad205163a90619e6c48309e944d8f0d5fe40dc83a70b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 10912 bytes
font_01_sfnt_off00011c8b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 16792 bytes
font_02_sfnt_off0001349d.bin
e49212dd5729bba58fa047683b720cd880cc8fb229d5d0df779a9b0404ec319e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1349D 16736 bytes

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