Malicious PDF — malware analysis report

Static analysis result for SHA-256 7481c0e7c29e5100…

MALICIOUS

PDF

80.5 KB Created: 2021-08-14 10:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 1aac9579fb5afe0d52508f8ace07e82d SHA-1: 8f08dc6a141793ec07b1043ee722c9f4261698cc SHA-256: 7481c0e7c29e51002a0b20c3fdbddbd8d42558ac8ccaa682726b77be2f3f1ade
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://contactfm.be/userfiles/files/71744197982.pdf In PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9be4a8d77b---mazinizuluwisilikuzimamo.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/aac1058f018ab7989b8ff940bfca692f/wokokewilosowodoruna.pdfIn PDF document text
    • https://fallsplat.se/file/velibatomen.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/21a08e54d554ba2ace7c004fd5262167/8893816333.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/zirabelez.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/82577438490.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f47b9b147de---gonipon.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d6ad71031---foruvefufuki.pdfIn PDF document text
    • https://tadimtursu.com/image/files/belofugenurikenewi.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/mubiwelefe.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/xibebogalog.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/fokugatewi.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/pidopexesigolofu.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/92868382660.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/xiwijakenuvifebuxipokex.pdfIn PDF document text
    • http://balone.net/_upload/file///9344388741.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/22285465585.pdfIn PDF document text
    • http://starsunited.at/upload/files/nipemodikuwewuj.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/betidijeditididikabanop.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075895bebbee---61098922331.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20d2f35143---21538961258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=myles+munroe+books+pdf+waiting+and+datingPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a756b715e---fisazatujaxabavobiwodebo.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_off0000d5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 16540 bytes
SHA-256: a76080894468a8b40757be198526933946903705487a098ce1901b3dad822239
font_02_sfnt_off000118ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AD 11368 bytes
SHA-256: a1340c28402cc7ca2016e7a372c42bf290389cdc38e58dfe6d67d7f4cd578a81

Open this report in the interactive analyzer, or submit your own file for analysis.