Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7addc8dfa6afee…

MALICIOUS

PDF

95.1 KB Created: 2021-05-17 15:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4d82ae19cb2f41d1d9b6b0391498e9b5 SHA-1: b34ac67729070ec4d5ff63ddd217f936a8c35bc0 SHA-256: ab7addc8dfa6afee12ec576a1a7e638261437a28c0a7b55ac4df32f894692ee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The document body is heavily obfuscated, but the presence of external URIs and link farms indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/t0sh8jebuenkijc8bbo1h5ie0i/mopolajinigaxenan.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608777cee50d6---nilisiwusok.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/215e897159152e2f97e60e49f735acb7/86508162803.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/25b1e956799299dfec826aa5bd6a6486/2638526532.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3a618042---rozinarolodafasafobafopaw.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/949b1837029eb6a2a2c3542058033898/fonuje.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/e8e8d82bc084d02b1bf6701abc37d593/wejuruvigefebimu.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/3f3f9c1165d12d2a7459b2667193e41b/78066131174.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b42a3bafac6a101fd1785bb20ca02b60/18496672455.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/n2b3ioqh76m7hjagg1o3opl9cm/zufazidutenora.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/49601313903.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/sevalezu.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae456cad3---89975734448.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/raxofo.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d2f9da58e---bamaz.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/tagotiruwokororakuko.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a249268a864---29743335297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=physical+therapy+treatment+for+chiari+malformationPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B7 5360 bytes
SHA-256: 83a6fd2028032633d212326c0381d492acb5532373d536b420accd3a717b56ae
font_01_sfnt_off000146d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D2 12244 bytes
SHA-256: 773084ac1de4b5c60e4ce5ef6d798eae8e71499756ae910292a20765342a9f7e