Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07f49e3eb4f6316…

MALICIOUS

PDF

71.4 KB Created: 2021-09-05 23:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0e8254044ff4038e25908a64b8b7e6f9 SHA-1: 218f0a9e23b162c05ae2c5d45d81fd28f37f6188 SHA-256: d07f49e3eb4f6316d3549140527fcefc163ef292a6ebbe3f24f58e8c3a48d1b6
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 a high ML score. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple external URIs and links to compromised CMS upload storage indicates a distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://chcial.ru/uplcv?utm_term=tropicos+de+cancer+pdf PDF link annotation
    • http://haithuanphat.com/uploads/files/rirefowedovavogul.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/77382012504.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb91c8a6476---75111664824.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/kubafagigajebegabowul.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/325e7703b6fa1f8dcfbcb88d0a6c2173/71678783896.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/suvixa.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/79979408707.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25832391868.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/midamokolatorovi.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/xajiwawa.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/85637131937.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/62456439203.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/62102342200.pdfIn PDF document text
    • http://centronegozi.com/public/12891908152.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/91802294303.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/51739449402.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/66n1gqlcfn5n9c19b6ek2uubgv/bopemoronemasagemuz.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94548560e---93448530811.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/4f0befb32884b09c6f6fc137023923bd/bowumiwanawixudekulimo.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/cf6791cffa2072ffc4f12e4a251ffec9/3016643574.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/184000945360b995234309c.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/92738672837.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/becf8e37a4696eafe435b599095bd379/11943447002.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/luzewojadewukofupun.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pofenawodepuwoxokido.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_off0000b749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB749 16004 bytes
SHA-256: e699ff4acae257251aec0165ac1908b184d5cea5450d32274a09a305dd54bd6c
font_01_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 10432 bytes
SHA-256: 090f8b594398f6738424ed5f2471bb0120ed6c5835a39320cdac9040a61c64ff

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