Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe39b7db87a7447…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 07:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c055e14c28e57154d74dc99f00914c3 SHA-1: 5ddc04e27d3e06c765e6e3972251fffbb97a1806 SHA-256: fbe39b7db87a74473df74e1a3ae543003c7433356acc5775068a8d9e86275713
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to obscure the ultimate destination of the user. The presence of these links suggests an attempt to lure users to malicious or phishing content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c89de94b0f---21887197144.pdf In PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/madefukatufaxer.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/37962421374.pdfIn PDF document text
    • http://7linc.com/uploadfiles/fckeditor/20210815/file/16289791154560.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/memizawamikoxakadekabe.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160713bdb57668---43681689446.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc8a23ee7---91624168968.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16071afe47297e---girarufez.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba23a95d653---70685527480.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/fikifelabunitexoza.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/64472408669.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/14882535925.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/wenep.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af45d3d5d88---83717607915.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/4f68253a9ade98b48d9b50b2830c6905/dolapezaroripidepezebaso.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcb2868671a---33678915614.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/d36a13657214f2541173a5d8e8cbeea3/rijirazofegefaze.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/tapenakanamij.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c46fce3d66---87472172888.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/2f2f8d0919c83f16cfc93e5ff361ee71/66033788009.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/80531074943.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/55809039336.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/da8dce2283676792265f48051581a5e5/75259852812.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/46149028416.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=great+quotes+from+zig+ziglar+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_off0000bd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 11080 bytes
SHA-256: d99c953b76677ff19ee69bd753cbd69dc50d8792f51cf868685827536b993148
font_02_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 17220 bytes
SHA-256: b2035c03b247c892d2e912eb006755df92083c0fef8b3dc85ec22d69045ed213

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