Malicious PDF — malware analysis report

Static analysis result for SHA-256 01646f49b2127205…

MALICIOUS

PDF

75.5 KB Created: 2021-09-07 03:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dea57cbba6ee5fd23a1cfd0ea51885ac SHA-1: b1a76148e2a9b4ce6653ec39629175b05e19ba5b SHA-256: 01646f49b212720551e4c540161c287e54979cc1f3f5575715b89649adbecd24
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URI heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a18c51b3db2---fojusam.pdf In PDF document text
    • http://maszyny.pl/userfiles/file/motenogapew.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a122b609696---61677004091.pdfPDF link annotation
    • https://seo-methodes.com/userfiles/file/malononifejiwuwam.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/eu7v54rumrjgmem1elg5lgjdd6/kedazogi.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/54432213279.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/56996384513.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/uiestndkqtfri0g091b40742d3/namepusigedasek.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160941101ba251---3117163209.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/mozemumap.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/51f82103b0bb1e4f53012f0bc79c4d6c/repejugofozo.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9cid78pc8ruj0jaigmkkj4op94/39524047773.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/d4c548dfa75270b7c9bda4220e449169/rupepazadakudapojodujego.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/28548594832.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a687ca4ace7---80916173624.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb80396bcd---kadebewu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9d81185556f589862b1d2989b046048c/67072501511.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/foxuwakixudekovoniwip.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/61406102560.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d4fd7c0ba4cc50b9e4b1ddb1da700e8/tufagapuvujisoguri.pdfIn PDF document text
    • https://prevodi-plovdiv.com/userfiles/file/32436359089.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/3fa58e3bc0aca858ee842dbc169e9c20/mebojurokofoger.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/bixuvusudokijodiripav.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce1f6d9ca1---mekusewalewuzaji.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/edbf3b9c96d2b3c3265ceb075625b815/78541931936.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/87948037763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=agronomy+of+field+crops+1+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29A 17424 bytes
SHA-256: 360b966ddbaf7041afd6c91fee428ae8042d7c380f0a015993e5b4ac24320e85
font_01_sfnt_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 10852 bytes
SHA-256: 9771c1f98898e0b1ff4126b31ee294a4f240109fa9c2938260e8a900d8face35
font_02_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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