Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adc32bf706f81e6…

MALICIOUS

PDF

85.6 KB Created: 2021-06-28 01:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aae965b9c02b1b74776672ffc38cb657 SHA-1: 224d0a8c8d413299fa191e949d9e2f631ecd1fbd SHA-256: 9adc32bf706f81e6fa205b42346f7b381ee5cb682b06300b9be3c3757c2ecb85
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ClamAV and an ML classifier. It contains multiple links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a command-line interface, a common tactic to trick users into executing malicious commands, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://medvor.ru/uplcv?utm_term=microelectronic+circuits+sedra+smith+7th+edition PDF link annotation
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d12f09fb5---62269336024.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/97027813583.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732ee7b5c21---51177725939.pdfIn PDF document text
    • http://vralumni.com/clients/7/71/71e0d721b250bdad3664bf54e70089ab/File/5768998868.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bf336628b9f---62474126067.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/90447bc423ec677b6719a62ef8bcdd25/wisaluzozom.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/93539080852.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/ddc66ce038d40e11d365dcd15d637c26/jofojafumifago.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/juvefoforalobamameda.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/301d25e462633c820959183b5bfba941/bagavisegolofinujuni.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606d696ba5de0---21191815112.pdfIn PDF document text
    • https://digireg.it/upload/jumixugomon.pdfIn PDF document text
    • http://xn--42c1dhzaq5aeb.com/userfiles/files/9363643003.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ef4cbecea8694d2bd872417271fdc9ad/perizodanixu.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/xixizovo.pdfIn PDF document text
    • https://2acontractor.it/images/file/88908388785.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/84626933961.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724fbf63533---katelifododafi.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e75709c5---tisotigevirovig.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/5352302387.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4379b38ffc---jimujupajarijod.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afcdd7ef1fc---tufokatadijorewig.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/dusokurotepolud.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/gibatabulu.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/xakoxonij.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 18536 bytes
SHA-256: 1a728800a1047b5dc53a5f782706d30995f0173a3313194811f6c77b51854e9d
font_03_sfnt_off0001309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309F 10780 bytes
SHA-256: a52718ffe12ceab655c93bcc10b32585e1ee0584c4d4a2ac1a98bab1583e6038

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