Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd41a6f5c8d1fcb1…

MALICIOUS

PDF

93.4 KB Created: 2021-06-26 01:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8867e12ca612a4ae41ade56217b61281 SHA-1: 6a1467953783043fd2cd0a6afa287b7a4a41b8c8 SHA-256: dd41a6f5c8d1fcb11349b3dd71292849ea3715509c58d6d7a94f73977e206fe2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or trojan payload is intended. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://nomylo.ru/uplcv?utm_term=hilarious+jokes+for+adults+clean
    • http://paradisoseminatrici.it/userfiles/files/51550267408.pdf
    • http://cesurmakina.com/userfiles/file/92333080685.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/77d0e4ece90f770b1babe1e303e1f354/gofebap.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fv3jq58dj3upm91auttg1l14lg/66145337774.pdf
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/80194682500.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba4d897830---92898712979.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b673c0bd2---pewadutoruwape.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074b56a5a77b---nararub.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607066ad142aa---13028733021.pdf
    • http://ranaghatpchsschool.org/userfiles/file/30852480658.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb614ac1e10---sadokak.pdf
    • http://bhk-aindling.com/userfiles/files/nuzekuzuto.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/3ae3f1e54124cec6258fd14be8b03b94/vazixowado.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bef81ece8---pifexefeban.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909a5118385---29589999080.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/hi9f2phab2bkjemkoe411a02g2/67906856519.pdf
    • http://www.sport-konyv.hu/userfiles/file/81664045053.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3896a2dc---pobekasipijow.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2eba54a2a11675628cb50f1c28a2e1fc/gurule.pdf
    • http://nandeestationery.com/userfiles/files/82821600368.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8d5586ac3---67407217599.pdf
    • https://yuss.it/file/wotiwegife.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/titazadotidebas.pdf
    • http://originalcheck.it/public/img_admin/file///zebetomawosumunoreroroguj.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8dd352686da4b76566b00e9e70e37b12/zatozufazibalajegenu.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a7bfadbf19969bbeb287bfd181106682/29765243580.pdf
    • http://www.lugashotel.com/data/editorfile/vuleduvo.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_off0001097c.bin
3e77bdcc4348226d14d67cdbccff3662ba07c5b7b6fc20257ebeb55922d442df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097C 17136 bytes
font_01_sfnt_off0001356c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1356C 16792 bytes
font_02_sfnt_off00014d83.bin
ba4c1ba7b272fab9d127e0363549d42b8ede956f2a46723c84738980ef9321e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D83 10784 bytes

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