Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba846a70183b6d0c…

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 00:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 565a06a96c1a92e6c21a33bf31c57acb SHA-1: 669ce9fad706631c25a59f1602e69de2176851c8 SHA-256: ba846a70183b6d0c48d0ebe1e1d601c2ec4bf6abf8044fb93188e6b37a32a063
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. These links are likely designed to redirect users to phishing pages or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=what+comes+out+of+a+plant PDF link annotation
    • http://www.abcklima.hu//data/editorfile/50545743224.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/39432118280.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0be6c4ae---73219052866.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/jukefurewavite.pdfIn PDF document text
    • http://alltechsro.cz/files/10530157512.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/duxur.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ccecc8774feba60c4129dcf9b007136f/fatewiz.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/bebuposimurepag.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/lasitiwidunitajisufulugoz.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/96i90dqftu94fb112eb1ilij61/likosajek.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160763bc436389---tulunivebig.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/86152877659.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/derirevoxegaxetiwipem.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/6nekt1a31palidmqfkn5oeveq5/16976872362.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e22c3f33039---96285003455.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/gufovixas.pdfIn PDF document text
    • https://nadamasristorante.it/file/4863108581.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/jiritafuvafix.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05e5fc4cec---musikewojazodijureseveko.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c743f808012---zobufexiwarofedib.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/3bf8e37bc41712d2bd0e872eb6f50bc5/99324104982.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608abc4dcaa66---wonopixarura.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/40482117167.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/n8f10rmlggrcb66s27qtocc53j/63282390464.pdfIn PDF document text
    • 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_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 16732 bytes
SHA-256: e6026cebe66afd79b269958c76bce772d2e4d7f73ab03c162c1aebc383b0f8e1
font_01_sfnt_off000116fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FB 10648 bytes
SHA-256: 678e43bd52e9dc4bc09580ddbea0a9dbc8cd8c28d797ce2fe226be424eb2d0ce
font_02_sfnt_off00012f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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