Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeaf932155b3493…

MALICIOUS

PDF

74.7 KB Created: 2021-06-30 05:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce0cab057ec5dadf243a407df6158d1e SHA-1: 21360c844c66c9858f34a93318442dc26fc63dfb SHA-256: abeaf932155b34936bf6699493e4ae4e073269f374c8380a735a4b4053bef503
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://abacusnancy.com/userfiles/file/30258739180.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9a5c3e7c53b431b66e579788811325e7/pejisuduresarisoweri.pdf
    • https://hosvagyok.hu/userfiles/file/jofiwadevotososola.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1d3c6689942f615ff388591fb52f4474/guriwegodumo.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d463f15210a61a92397a35feb02a7fc9/28348902877.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16080839a3b6aa---vukiridibaloniwejufe.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/138cc9740415db500db62f8919c540e2/xefajowisetupodabom.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/a5595137e126090cfd3b71da07118e08/dixovawajokixu.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e2a2e051---tetulazebedumedanaxedibi.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82404bfe1---gavereso.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b0fba265b01e2b45ed5ff522730d5769/30797698049.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e03e6fbe7---81568288103.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607afee7039b9---fupudufudisiratokax.pdf
    • http://csim.jp/ckeditor/uploads/files/dudumibusafepamojetego.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078b3ab0c5ac---juwubiwedozevonexi.pdf
    • http://ahcxdq.com/uploads/file/031059426327.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/dcddaea25f1d1b55390ad8c7ce069dbe/52567462879.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078229081934---89563730621.pdf
    • http://robertoantoniz.com/resources/original/file/bisinavipetajoxek.pdf
    • http://bigandtallking.com/userfiles/file/josebotaropuzijidapoxudu.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e97b9b74bb---begupol.pdf
    • http://sethhukumchandschool.com/userfiles/file/gejolunanixitase.pdf
    • https://mytekas.com/UserFiles/file/17520247576.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/b52f5b72b323df4488d78d25a04af43f/xunasitiz.pdf
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/mivito.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10b308947---23915198099.pdf
    • http://elateridae.com/images/FCKeditor/file/84661062650.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=differential+equations+and+linear+algebra+4th+edition+by+goode+and+annin+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_off0000c255.bin
386abe934cc9d4feabb6f9716b09af08882c86f319300ce6d54c730d04f4409b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC255 15592 bytes
font_01_sfnt_off0000ea32.bin
65eb0ee6ad4dbba21b6f38e021f3e84d35a52993b0151d6aaf6a32460aeec055		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 11356 bytes
font_02_sfnt_off00010432.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 16792 bytes

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