Malicious PDF — malware analysis report

Static analysis result for SHA-256 a776768bb5280fcc…

MALICIOUS

PDF

88.0 KB Created: 2021-08-01 18:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ed95b344538b923f91708b493ce332a6 SHA-1: 4e2a11eb2f0edae0584f9e321a812e197fce52d5 SHA-256: a776768bb5280fcc05e85cdc4dfa76120157817406a38533dd7d2b843a67e5c5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to distribute further malware or engage in phishing. The presence of external URI links and link farm indicators suggests an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pnmanagementsolutions.in/uploads/63571678766.pdf In PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ebb09e609---kofasodux.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/lilurew.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a9a66bade---povewujisutanobedapuwad.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7368da6ed3bc97c9d62b969d012dcddc/nivawoxebazuvupufimami.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/zuvini.pdfIn PDF document text
    • http://imbirimbir.ru/files/62608587454.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ce51a83a9731061a71293153d63e8b78/ginifinulowiwamerafofokaz.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607153d57ea20---revatowoputet.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202106180551131120.pdfIn PDF document text
    • https://sambelteri.com/contents//files/14324438912.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/rerogenavonoxazum.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6c6261a94---lagagixizoxubanarevuseva.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/22672252405.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/41658389899.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160942090d06b6---74976998908.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788438c8a2d---46230150523.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/46358771273.pdfIn PDF document text
    • http://geoman.cz/data/file/lakigidanenezugopuz.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be6ce5ece---26651362636.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a167af8a90a---jakukemenozu.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16089efc8d3df9---26505341907.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/aem4dlpht0rq86bsh1ooovt16a/56703816087.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/1269977252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=why+is+my+keyboard+number+pad+not+workingPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF105 11316 bytes
SHA-256: eac878009fbe9bb706077d8a357355eae91ac028f9653b60cadda8b77d1564b3
font_01_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001232d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232D 17644 bytes
SHA-256: cc9e1e71a477b65aebe1ec1d98d40e67b028b4ac329754b5deca9a3b74c7f905

Open this report in the interactive analyzer, or submit your own file for analysis.