Malicious PDF — malware analysis report

Static analysis result for SHA-256 003d068cb8ac5b51…

MALICIOUS

PDF

192.2 KB Created: 2021-06-30 09:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c51ef72783031d7889cbed9288e72c3 SHA-1: b961f14941c6a2e50b7628cce74bfa52198f5d7f SHA-256: 003d068cb8ac5b518c125d6ebc10d18f91d295b97f0da87586f30c9865305c29
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/67aff1fd2587d8aff5ae44f2acdb61ea/vozapo.pdf
    • http://gerd-pollak.de/userfiles/file/jogapipezi.pdf
    • http://www.anclupnapoli.it/userfiles/file/32789399962.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c1b6a3694a40bb0b52125f89d6af35b9/xipojuvekoboxupumegu.pdf
    • http://dekoblickfang.de/userfiles/file/kipivix.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795f997c93d---zixelixafobojumoxuwuxow.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094df9402975---tibunibanijo.pdf
    • https://airflow-skateboards.com/upload/file/58095738938.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/fdp3h5kik1gv8sr1j8hr2q2qna/84810728764.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/nifufovikugujewerojexewap.pdf
    • http://linuxnewyork.com/draft/media//jexoguzobapewupofa.pdf
    • http://rideabikenews.com/user_img/files/89204300045.pdf
    • http://katyababash.com/images/uploads/file/zerutobavexojabalom.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c2400f62e---bibagerodade.pdf
    • https://presstone.hu/userfiles/file/tuvinub.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608506bbae365---debokujus.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d317fa0403---gizajavovukafakelawi.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a71a5c2e57d---46903250739.pdf
    • http://goldnumber.info/userfiles/file/joxipukagatusup.pdf
    • https://resonanceacteurs.nl/userfiles/file/damepewotujexoselaxon.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/xidizuxaripimuruwalem.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/baa3f1c88386a3ba576adf2e2cc0c33c/70933369941.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160837825383a9---jovojobi.pdf
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/67446431347.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ca4a3669e---kojusobivizexokow.pdf
    • http://jandenzobv.com/image_uploads/file/65973314412.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=criminal+law+codification+and+reform+act+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028b5b.bin
dd4079885645fd7f18f6ca61bc2f77cadfbef54eafb7c96935b4750623857503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28B5B 17228 bytes
font_01_sfnt_off0002b820.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B820 16792 bytes
font_02_sfnt_off0002cffd.bin
aa05cf079b0d51a179545f5e62b3a4c6ff1088f47710f8d6c04d42c0465d7343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFFD 1224 bytes
font_03_sfnt_off0002d71b.bin
8fd80eef4024548cce7557e3427fe421c556bde3603ce6564e88df5f94d84929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D71B 10728 bytes

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