Malicious PDF — malware analysis report

Static analysis result for SHA-256 975a7a5b94ef0788…

MALICIOUS

PDF

115.1 KB Created: 2021-07-04 06:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e04a26ebb5a35d4b46c41437f10ede2c SHA-1: 093d527c589b7068a5256a33a464e03db649fbba SHA-256: 975a7a5b94ef07888d8348d18ed31e5846196b8f0bc6a61548efa0c66684d46f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS platforms, suggesting an attempt to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a link farm designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/16e9d8b106c5dc5c5c3b0b28026c2476/11203880139.pdf
    • http://amdind.com/userfiles/file/jefowatusuxiwigitoxix.pdf
    • https://best-label.com/upload/files/sujeduxewavexevajan.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/49060757649.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/8d190a0c6e4305d20833571481ccf39b/68982470545.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b267daacd---filijalezevofusitojal.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b692d06711---dobefem.pdf
    • https://sport-jicin.cz/dokumenty/48791005893.pdf
    • https://sindonis.com/userfiles/file/situsizoros.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/8128ef4f310223735b7c60bf6f6133c5/tapenogun.pdf
    • https://akapacha.com/userfiles/file/kigesobufifidixapotal.pdf
    • http://nesthomes.in/userfiles/file/14692869296.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/36277331117.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da82b81a178---97914011268.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6cda5b428---naboxiluziwewaxuno.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ed7a852f2---nepatalavofolujelowamovat.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/3kkncf79vghrhs1pvv33h4jnkr/penikofire.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/76ce332b8f53ac414d7e3976bf60ee7e/62352939520.pdf
    • http://maychamsocda.vn/images/userfiles/file/65318796584.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/a1fb139b6db1f9540293aaf969920722/59075661263.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a2cbb980---1694931649.pdf
    • http://resortcrimea.com/ckfinder/userfiles/files/81635236562.pdf
    • https://bbpartner.cz/userfiles/file/gozatuw.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4f46573a1---37155647863.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160830d7323f17---refogaz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=multiplication+meaning+in+english
    • 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_off00014451.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14451 16792 bytes
font_01_sfnt_off00015c62.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C62 16084 bytes
font_02_sfnt_off0001718a.bin
c019198fe78ccb16d43b483d41a5c52c3652bd9d9a71b54599fdb0df587bd616
pdf-font-stream PDF embedded font (sfnt) at offset 0x1718A 19684 bytes
font_03_sfnt_off0001a5e3.bin
75a96f7dfa548d4e7ae0cbf8980024bf57236d2507fe3a438ab11684a2360169
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5E3 10812 bytes