Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7f465a1ecf52ab…

MALICIOUS

PDF

251.9 KB Created: 2021-06-29 08:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 209c7f1ee622cf32f57452d1a7b0a419 SHA-1: bf56730c6a0423aa0e768c8219886e6f7c6d68e6 SHA-256: 2b7f465a1ecf52abddeb683c0489542e9438fdb2f87f0cba725c86c47c8edb2f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristic firings strongly suggest the PDF is designed to redirect users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

Heuristics 5

  • 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.
  • 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://cructi.ru/uplcv?utm_term=media+and+information+literacy+book+pdf+free+download
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/49hdn46r8p5tl5p9n4f4b25naq/50644792871.pdf
    • http://omatsuri.kr/data/userfiles/files/pabanumugejidotu.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e023d32199---43941633294.pdf
    • http://nguyenthaotech.com/upload/files/gudazikumi.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a99354f37f---lipogukina.pdf
    • https://mauspro.net/upload/files/44590277866.pdf
    • https://egyiksem.hu/uploads/file/20019184518.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/38rltqjso34gub51sr06s85d76/75345790581.pdf
    • http://nhs-carpediem.com/clients/46367/File/76896288110.pdf
    • http://instandee.com/Images_upload/files/vebatufumenodaz.pdf
    • http://nguyenthaotech.com/upload/files/lizariwobakazijuzale.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cad29ef0062---97207103598.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2f4e0ce689bf7c1a4f2e377b8917901f/dozejefolovevowaguwazasa.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/wumibutegopirusokosum.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/malonepipikokamilix.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a5ce6c02c3732e3fb4b67dafce8165a6/92460679680.pdf
    • http://kjphotocon.org/data/userfiles/files/28570971109.pdf
    • http://traiteur-ribot.fr/userfiles/file/fagodizowi.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/9iuubc0e2td15vktejemnaqu64/4764680048.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/97e2ea1a6c384d4d29f3579d3bfc8a2e/68253973445.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f98fb5f1c5---89012557020.pdf
    • https://maintogelonline.info/contents//files/jalelixebesa.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/cb6f10a36ea7b2f415a4a3342ab00d7c/vamof.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/3685b32a73a38fb307e9385b492c5916/98152237188.pdf
    • http://bestapp4u.com/admin/uploadedfiles/file/37142591143.pdf
    • http://kap-group.com/ckfinder/userfiles/files/87135275244.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80432721e---fipezugetawo.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
stream_004_off00034b10.bin
536d8fed7e9b00a90bc33248b4213be18faba164ad0c58807b9182e86f2cf3ba
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B10 21092 bytes
font_01_sfnt_off00036fa3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x36FA3 16792 bytes
font_02_sfnt_off000387ba.bin
58d90a7072b5a2b59b7762686a811fd3e7bd83baad8b7bbe889eee48017dde0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x387BA 11040 bytes
font_03_sfnt_off0003a13a.bin
24fcbf741cd5adb9fe7e2568703fdeb2d18aa56b5a6ace8aba6596270d5c0ddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x3A13A 25948 bytes