Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d891e7294f79a8…

MALICIOUS

PDF

95.2 KB Created: 2021-06-25 17:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 232e232f56781a4369214717eb136418 SHA-1: de4a73ed40b45e7415351d98806a0af6cc34ab1e SHA-256: e6d891e7294f79a8257276a72879520be9aff1aa00ba1eab8d243c4e09a15d4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The PDF also functions as a link farm, directing users to multiple external URLs hosted on various domains, some of which appear to be compromised WordPress sites. This suggests an attempt to lure users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://archism.ru/uplcv?utm_term=what+can+ringing+in+your+ears+mean
    • http://files.ibiza-ferien.de/file/80395033092.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/de479c47efbc21b2516bb94d0a355138/vusopezikuj.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/bf7af312bf72496194dcc5ecfdd4309a/lifovevoxisozepumurumadol.pdf
    • http://solmoda.it/userfiles/files/dejovasoforo.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/rbttkl7e7cg8ph58i8fm8flf0u/6802585352.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7c3aeee122c58c48c15ce5b10f1c8e6d/98191019040.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/q43lovdhhr15onfk45qte8d9m4/rovapavire.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/63200c19f77bd8bcd3f091f187f5e4f7/14995419962.pdf
    • http://cphs1970.net/clients/877309/File/rakuzafunupewanon.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/ltabj1ajocdfa7aljk34c5oa0q/wivuzodolopidemudovuvi.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847b154a47f---fanuzogukakolebiwafa.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0345d4a6e8093cdcc80546d0280cf5e2/medibupi.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/95dfb3ac1d2193d98447c8a4eafbcfd1/35978764067.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608838d760344---96434927377.pdf
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/wigegolupovu.pdf
    • https://markmont.eu/editor_uploads/system/files/sixilazul.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb068808ce---2906443219.pdf
    • http://elfuklid.cz/foto/Image/file/ramigolitoxuwumazidukarom.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/tbrago7ctkgs0iutkt1ur984rj/74600070375.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e863d37cd---waberinowimidixekazukoji.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/pgfee7e99kfljpd0au6a5lad3n/26165310625.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ae9a65dc41445c17b2d98964ad378423/zixezabejudapuxaduzaba.pdf
    • https://tempegaring.com/contents//files/lagagixubojijose.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/kenafewiverevewukomafumi.pdf
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/gedipefasefarokel.pdf
    • http://sbnjl.com/userfiles/files/89019752136.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_off000112ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 16792 bytes
font_01_sfnt_off00012b06.bin
97678c04aae014c57bdbdc6d0d7db26cef6b31af909016c668a361c88884b038
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B06 10836 bytes
font_02_sfnt_off000143f1.bin
1b23604f9a268a2a56ddd644c00bac9befa81534cb2b5bebe26bef7858eceb21
pdf-font-stream PDF embedded font (sfnt) at offset 0x143F1 16716 bytes