Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6ca7f4387c065e…

MALICIOUS

PDF

85.8 KB Created: 2021-08-18 22:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b5693d6114600e3473f73a230d580a82 SHA-1: 8aa1faf2327c235fb29d336c3081b85b507ecd6d SHA-256: 3b6ca7f4387c065e11bbded2521361e7f1141e2d5926f730d151a12474b88f3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs hosted on compromised websites, likely to trick users into downloading malware. The presence of multiple PDF link farm heuristics and embedded URLs strongly suggests a phishing campaign aimed at distributing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ba17e1f9b---kadokusukoxebupasuz.pdf In PDF document text
    • http://aklond.com/UploadFilesfile///2021080402534340.pdfIn PDF document text
    • https://ms01bet.com/contents//files/wozadimofedamebe.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/37834241770.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/4657099378.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb15c7d1e4---70041025925.pdfIn PDF document text
    • http://abeess.com/userfiles/file/mavebunulexovaviloxilivus.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160782ae12259e---70669557427.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/63650643823.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16079a5cf3f7b4---jupasiki.pdfIn PDF document text
    • https://facade-metal.ch/ckfinder/userfiles/files/97563123125.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd85a096184---gororat.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/vukoruwolefo.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/97afe27d4cddacfeccfa4be8c228eea6/pewinefufom.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/3810146482.pdfIn PDF document text
    • http://bsinteriordesigner.com/userfiles/files/60184756325.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16070f04d4c385---loxipib.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c032ec86cc0---dabekowim.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a190d2dd505---25250631160.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6477b579be---35135941581.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb250736c4---53673715851.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084ed5553650---65156438673.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/f071ea619f2ac9839139a39a5f0fd95b/wumefugokunarexapuvuvini.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/92557621708.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/jebubemeguvobevowewise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=god+of+war+2+ppsspp+android+free+download+apkPDF 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_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 10728 bytes
SHA-256: 63964267923d3c518d4b0967a97e594ccc5b803744f4ad551780e9db8afa89fc
font_01_sfnt_off000105d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D0 16476 bytes
SHA-256: b7c4454582d9759fc5b6ffbef9aafcd45ddfbafc621fe81325090d587e6ca05b
font_02_sfnt_off0001309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1