Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48c4e102f9c6c2c…

MALICIOUS

PDF

87.9 KB Created: 2021-07-24 08:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f460fafcfb6cd479cc5fc236b4e2783 SHA-1: 9a538610c916f65541cc5a96ecfb158f23512832 SHA-256: f48c4e102f9c6c2c0c9ff7ad4b2df5e6274413c91db79d0e864b52d1cd0c5f6c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f95fc934d9---bomukidarizosaguvado.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/sn87dl2vu0r361414q397j3im5/42882380600.pdf
    • https://cissud.com/uploads/ck_editor/files/91629565192.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084feaec276f---41437264185.pdf
    • https://cardion.dk/gfx/fckimages/file/bopap.pdf
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/buxon.pdf
    • http://indel.sk/userfiles/file/83530606830.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cdfcdb4d594193eb07e82f04b9696328/52823118616.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160832574f0104---fekazopafojopivopulore.pdf
    • http://asustainable.com/global/file/62184496367.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918aa84001b---8463984697.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af87aa04f4d---12979148721.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52bfa9f26---61891710178.pdf
    • https://digireg.org/upload/lokilomugevadu.pdf
    • https://cecprint.com/images/file/larenorudumaxevog.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e250862c9---66867954308.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be3fc14aae5---mupevozino.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/8ab61aea8f4f387416df0fd564738b86/mokemitusoresiwuxa.pdf
    • http://vstarmp.cn/upload/files/20210624_035625.pdf
    • http://kukubara.com/zdjecia/file/24542036601.pdf
    • https://malashealthcare.com/userfiles/files/83094411453.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105031430574278.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+last+jedi+novel+pdf+free+download
    • 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_off0000f280.bin
fa8662855e584891390ccd87cc9cdd282a83e41036c477b1388a3c52b150774b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 17232 bytes
font_01_sfnt_off00011f89.bin
792805c44e830578579fd27a53be27cc8d968aee9dad0c91dc414e7cd9761bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F89 10840 bytes
font_02_sfnt_off00013884.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13884 16792 bytes