Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14322cfe3691f02…

MALICIOUS

PDF

88.9 KB Created: 2021-06-30 01:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67ef16fa8d17987c7b2e4e28fd3a0c57 SHA-1: 6fb5ce52361639445d11fb367b1b6e298c128105 SHA-256: e14322cfe3691f027fed9eced66fe0a57c70812d560b3c001160527e9d541404
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to redirect users to malicious content. Although no scripts were extracted, the structure and URL findings suggest this PDF is designed to lure users to external sites.

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 http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/bq8tpof1ehsm9h1ufe4uben2gq/43193390081.pdf
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/viwukanepemuzafewesulamuw.pdf
    • http://a-daily.jp/app/webroot/contents_img/files/79448733259.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/c76a0e2f51d904cf3ac1d25e04fe1ecb/welitedowetuzopebagaxigex.pdf
    • http://closehorses.com/userfiles/file/71115865291.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db8dc3a8145---28483398117.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ktn9m51leeg6tt08idr6usfloa/57214207479.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/jbvrmbgfoc128kirs6lt9rkcfa/xitorutafuludikirukanojif.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609042a90da42---10961808147.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d881defd---31471913918.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c602bc946e4---72494880917.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/da0srk7gi640s6d34rqq4oisvu/gojobane.pdf
    • http://renovator.cz/files/file/79520139211.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3d132bbe03930cb09ffaf83339b72d49/4489298383.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160adf1136ba4a---15279618302.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b779622683d---zanosuja.pdf
    • http://sooclose.eu/upload/File/56402871178.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160798930df26c---ruvezavab.pdf
    • https://atraba-holding.com/userfiles/file/rimadefimex.pdf
    • https://smilaxlabs.com/userfiles/files/97018957580.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f4b3816893---3888368312.pdf
    • https://rieker-consulting.eu/files/file/kudugefulamavamopumagul.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e87f88e712.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160da064e162ed---weruna.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=critical+of+yourself
    • 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_off0000fa6f.bin
bd0633cd79a444f7deb1112803dd0aa5d896a958f3787312eb9312324f8e1b03
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 17168 bytes
font_01_sfnt_off00012692.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 16792 bytes
font_02_sfnt_off00013ea9.bin
3d2a5509fffa0d25ad8473076fdd4311e64d52d8cb4354201a8edfb589109bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 10468 bytes