Malicious PDF — malware analysis report

Static analysis result for SHA-256 628b06ffee610e84…

MALICIOUS

PDF

84.7 KB Created: 2021-08-31 16:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bd2e63bfd816c347f12c7f07ce4f2550 SHA-1: 2541839e44bae4188ded5afdfd76afe9b6e2df3f SHA-256: 628b06ffee610e841413d6a37e296bf71843921403443b80fb5bb6e4814803f7
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 high ML score and ClamAV detection. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://synersys.fr/contenu/file/fatizifisiwarezesit.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac42135df2---gurujulena.pdfIn PDF document text
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/41594717689.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/33810725595.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/lizojijokiraviwud.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bdd57454a---86375537629.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/puwugarobuduwinonilo.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/javadoro.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/7e84081a69cd42939eef0d1c337c92c3/degimafemewukojifubiza.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/vetanasuruwagajot.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103a054c4229---40686578517.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/9fa009624586ad7981d6a0bfbd866d8d/12945047536.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096537dd4b89---85288138296.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/bivogovegenawoduvaxuwole.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/jupl05clfus3ouh7i2gpnhrskm/28470480435.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4a4ad9688e---17627784934.pdfIn PDF document text
    • http://zae.me/datafiles/file/litesojofodigeresogalaro.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/5624930569.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/21420370407.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/416162869.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b376728ed---41568121153.pdfIn PDF document text
    • https://morabia.fi/images/file/7517814069.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a010ac2ad0---sodorata.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b347073393c---tujaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=son+of+the+morning+star+biblePDF 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_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 10876 bytes
SHA-256: af8b319bb070a93618cd77fcfcefbd969f2377d1f1c5892a9cdaa2efbdad8781
font_01_sfnt_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 18340 bytes
SHA-256: 7e49aa067eba77b48655f484e99c4b7cba3d2fe1d943c3109538d5b95708938a
font_02_sfnt_off00012cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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