Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0aa75e4fbcc4dd6…

MALICIOUS

PDF

95.9 KB Created: 2021-07-19 17:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6776f213a5b8305c71ba8287e189e1b SHA-1: d775baa57a9b4ab7535cde175cff7bb79c5d8b79 SHA-256: d0aa75e4fbcc4dd69ccffb25c38efdff02c1eef31bc4563af989d8593a782e0f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a link farm hosted on compromised upload storage, suggesting the document is designed to redirect users to malicious content or phishing pages. The embedded JavaScript likely facilitates this redirection or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 7

  • 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.
  • 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://fiscalonline.eu/app/webroot/files/userfiles/files/33849824655.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0e6f2c740---zotulanidodado.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/938a1d45rqjrfpv3aahhgionf7/woludixezirunupawewoj.pdf
    • http://amandamaitland.com/images/file/64673114031.pdf
    • http://starrsgazette.com/admin/images/file/nuxelabatarurom.pdf
    • http://nyett.hk/uploads/news/files/xisitilezajerutenuraxir.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8c530aa37---25245362062.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/sq0v7irgvu35threh7ia33i353/kugefuluzefutobifitamoped.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rclrbfepbm3ms6leteajurn0k1/jumurojenulapivo.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084019524a80---88691362696.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc36d755f12---dixisuleneke.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6213b534---33540695980.pdf
    • https://poolpoint.be/uploads/file/75086656210.pdf
    • http://speed-r.com/js/upload/files/67592807599.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609039ce41eaa---kupemepovixasisufanususe.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a61b6862e022ec8bf944fda7288e611c/13246715226.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5257c335da---mujegovipu.pdf
    • https://chennothinterios.com/uploads/file/nekebotikivurijizexakasik.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16080576481192---tupepejobefo.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/98d889592778ad8e30412343e0fe45a2/falafokonisomiz.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a628b3096d6a63c07be912aa66cfddc4/lubotowusopomibedodumela.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f1b074aafc10890cc7f47befdc8008d5/dojuxobofotusoriradavafo.pdf
    • http://snap-drone.com/userfiles/file/domaseden.pdf
    • http://theheavent.com/userfiles/files/46854122502.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hinky+pinkies+with+answers
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbad.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 16252 bytes
font_01_sfnt_off0001118d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1118D 16792 bytes
font_02_sfnt_off0001299f.bin
b0ccc3fc5500fb6d09b20b9ccc4e4a5a013666df3ef3206fea0ece4d565b9880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 17924 bytes
font_03_sfnt_off000158c2.bin
cfd620c131bdd577b90965e8e6ba5ac5815bc60c1d14515461f767977d593ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158C2 10464 bytes

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