Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc56a3c11d389ed…

MALICIOUS

PDF

74.0 KB Created: 2021-09-01 04:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 72dd85fcfb8f132690f30a3515c96c10 SHA-1: 157b6ad522c1f7cae7474ae49cafbfd01bc7216e SHA-256: 9bc56a3c11d389edd3ca37edbef03991f962c8321e4431529650cbadbd3668f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, directing users to multiple external websites hosted on compromised WordPress installations and disposable domains. The presence of numerous URLs, including one with a 'utm_term' parameter suggesting a phishing lure, indicates an attempt to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://garglob.ru/uplcv?utm_term=app+to+watch+movies+on+tv+from+phone PDF link annotation
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tozipadigokatajosof.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/443bd67ceb3c29a0b0d5ba0fd89e04df/miropun.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/9nmugac36slf5coe4vskj9pdol/xurolakatavebibovasabopub.pdfIn PDF document text
    • https://laser123.com/geektic/files/17602707004.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/94695567423.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c929c9e700---65207819505.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/59ccbe8c9ef2852f1087540a57e3d7fe/vizibijakilipik.pdfIn PDF document text
    • http://peoplefineart.com/assets/202108/files/20210823225151955832.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160892e659562a---xuzigakaladufiduxilo.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/xarukeporegimo.pdfIn PDF document text
    • https://euro-commerce.bg/files/22899379805.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16077f39bba55f---buxujaperalenu.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/88562908032.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/rerawisokimitemutegi.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fb231ef97---54536491378.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608352d1258b9---50645445319.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/78694945537.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac441917503---lezusurekixibelad.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/fepowusikotufotesiwaxazub.pdfIn PDF document text
    • http://jarosi.hu/files/file/63786986592.pdfIn PDF document text
    • https://olterus.net/contents//files/lirazazukumubajezegeno.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/49008363193.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/31343698205.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210523153213.pdfIn PDF document text
    • 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_off0000beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB1 16032 bytes
SHA-256: 1a55521d09956a6c1755722bb6ab79f88312ddabb803733e33854316d763b715
font_01_sfnt_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 10832 bytes
SHA-256: 7ff87e294dfc76c760abde9cb6bc4be9625d23b924d1b0206a701d17651ae043

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