Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccc7b472a4d1ccf…

MALICIOUS

PDF

116.8 KB Created: 2021-07-19 11:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b7c5cfab6cde2bd8b1be4c269c2db0e5 SHA-1: 1c78ca4f1c383786332dea64be073c2b430c23db SHA-256: 0ccc7b472a4d1ccfb0b4a4cb3e5a4b8b6fdb634f361ea83a7c3363adeca734fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to other PDFs hosted on compromised WordPress sites, indicating a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these chained links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d0dcf63888a7b4c279236047eba47074/dovimedesijonunubedux.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/4c87bbbb3614a0c77d15ce780b67b521/murulupavatejetevinejese.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071f972ddf45---2811466445.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608046f3e1fd9---dotosadefiwenezilam.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a358f817641---12374737520.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbcac28d6c---gurar.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/vejudabiw.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/69eb102cd0f836dbafcdd553c0ae0d55/79341016455.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/a8cee732149987428e0cb1251613a270/23202663245.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5cebffbf---1850148549.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/867957475.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747cb888eba---kinofemojokilijagaruxul.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfed0a8111---85385926069.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d893922aee9---vofasimexaja.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/98e26c7fbba3a09a39cb98b1c60200df/sowimanes.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609117fad8476---7506874664.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba983580ad2---xorobimonurazedotefilu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/r5eik9pcj93mlos0gt4mgib5m0/lujoraxopitexanom.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f961339207---gokapu.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/lufabolet.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/70975660696.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/ridotadamozaxodisibonuvut.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/aace5f2f3a85095e357a38e3949ddf51/xegowe.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b69f1fa5c---wezalalogap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=use+the+quadratic+formula+to+solve+for+x+calculatorPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001341e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C35 11060 bytes
SHA-256: c8ba9240c218a2c0c391deeb9654c753ce93d9eeab493a5c05fc9fb339b9dbbc
font_02_sfnt_off000165c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165C8 17536 bytes
SHA-256: 258b012e01cd586b099031d1464568482784df3612ed817d2f0a8b7a08603ef1
font_03_sfnt_off00018057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18057 22560 bytes
SHA-256: 0307aa26969ca821690a03a53f21357abc966910b1442b34106b2f455bad4aa6
font_04_sfnt_off0001b819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B819 2948 bytes
SHA-256: b6f53551162136cdd6296e43e70436263f3bfbc65d53e145de305f39cc6d0603

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