Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af6cb2c48739481…

MALICIOUS

PDF

204.4 KB Created: 2021-08-06 02:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c19c6d55b2b67bc3b60fae5062c97ed SHA-1: 147eebbc7f6d8a00fb55b04969c440e3e277015c SHA-256: 8af6cb2c48739481c69fc32c6d3e6d67f785a5d34cd3245e61dc964e7213f2c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, suggesting it is part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL, while marked benign, is part of the lure to download a document disguised as a "cobit 2019 design guide".

Machine Learning

  • Nyx PDF Classifier malicious score 0.8308

Heuristics 5

  • 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.
  • 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://alemotta.com/resources/original/file/denebatawij.pdf In PDF document text
    • http://aarogyamedico.com/userfiles/file/nosij.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/jubede.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/subobikofanewujegudime.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/eeebcc89b7caf9e1fbf8cc6867100f58/fakotixafijapazulesev.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/44318679633.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/751d1e335bac1e920243faa8639def94/mawowimigifabutiwurarira.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/5391fba82bbda27764f15da62e2a5e45/63171182982.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/xabofiwezekevixibaxat.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/jekep.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085cae37f261---71324513552.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/veecju4svmteooup0hmfe38s7h/javug.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/kirezipe.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103e99bc4668---24514338004.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/bejudibaserub.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/acb164490aa44706d5d8fbddc4d929e1/45807024190.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3d1ea3d9a---80156934952.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/juvazigesujiveweguxa.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0f7rk8svm07ll29jk1ra6sa0o2/zevolefifavofizerib.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/dozefozugisunipovako.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/sunubilowisisorizifilaj.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/fonoxorufigosedani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cobit+2019+design+guide+pdf+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A488 19436 bytes
SHA-256: c257db74def511fe9bffb51d099a79ee2b06ed427f32944a780cbd6a1cca0216
font_01_sfnt_off0002d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFAA 11492 bytes
SHA-256: f8e8949269312c2fc21aa796f386cdc54a0c2ff294104c9b120c66ca810e15d8
font_03_sfnt_off00030abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ABB 16084 bytes
SHA-256: 629677e45faedee601e08dfe5d93bed8cb2cbab2933fb40e48fc5543807047de