Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee3fb48429332d8…

MALICIOUS

PDF

102.5 KB Created: 2021-07-08 13:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb5f54f5f8645fdaae9566db1b2ef90a SHA-1: 689b479913217dda4229e869152404dd8052df59 SHA-256: 7ee3fb48429332d8fbc4e8d98e972e544df003731d10d7c95ed23183978c3003
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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://provia-events.de/pics/fotos/1/file/60510105689.pdf In PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5374723a7f---dedupizuvoloropog.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944d8e08597---23338390262.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839fd6b4c62---24153139508.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/10906127652.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/nenusakakojerejibenunikaz.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/77198822343.pdfIn PDF document text
    • http://aweibel.com/Photo/file/59209699346.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/216e803a697df73b65a38d5c0080bddd/bozeweniwodiruxoride.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/06/file/30107028274.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/adtukirdr5rkdikvepsa5k8839/mesajonaxuwibugarosu.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/18/file/20210518_172719_159.pdfIn PDF document text
    • https://easybuildapp.com/files/uploaded/files/dugomidafagukisexej.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/21950498433.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/13693303740.pdfIn PDF document text
    • http://bhs76reunion.com/clients/e/e7/e717e6e8e39ea4daeda922698d41f3c9/File/zidotomubukogap.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/85165590794.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/a955415278646221ec166cfb4a9ea968/nagopavenuxupalal.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/93b60e981855fbaeb64c3a36d0aa59d4/vujaladuzuleguxaraw.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/weginewomamabufojojol.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e654712091c---32469959650.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/77885937923.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e093c4beab0ddff31d3c334556472fb4/dulogego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=torment+meaning+in+teluguPDF 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
stream_005_off00015325.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15325 19212 bytes
SHA-256: f6d90b226ca979745b96ac17c48fcfec4b1535c91187a84776bb449791915c36
font_00_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 27712 bytes
SHA-256: c048951df84467d2caf45ac48612f53b00d05e9ff7142bebb0b5846456484c4b
font_01_sfnt_off00012d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D53 3860 bytes
SHA-256: 991aac9c4777c8d1d2fcf9b549ade0b47f74c33a5bc3555042b58725a44248f1
font_02_sfnt_off00013bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDB 10348 bytes
SHA-256: eb15e3c2cae834e50bd8bf674fa3873883b2046981e8470ed912f072b46325a3
font_04_sfnt_off00017355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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