Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d2e245b3d25f5b…

MALICIOUS

PDF

100.2 KB Created: 2021-10-08 08:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7085e9ffa1567418ed44502fcaa90341 SHA-1: 2c54447b7d90ef191e5413baf2dd17a28b98e76e SHA-256: 93d2e245b3d25f5b2932ce56f286d878b515a12d49626ea9e2d7dade58bba63d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, potentially pointing to compromised websites or hosting malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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://weorderfood.com/uploads/files/wiratedegozixamowemukaxit.pdf In PDF document text
    • http://alexlunacoach.com/img/editor/file/godarivasafojugaropozudog.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/31214300883.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/rojusizimolekipet.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/tubani.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e779c132---kexisoguw.pdfIn PDF document text
    • http://chinalabware.es/d/files/7287799754.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6b4afaf5fdec2e900f99fecdd825b3bb/58929712785.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/tazavokora.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/jotusisewitatapem.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/guxexasidalozatitakum.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f545643b60---97490687238.pdfIn PDF document text
    • https://cliniquemyo.com/userfiles/file/12135012095.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/abf88fba91c86eda3837b3674d652073/mukiziwowawefirideke.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/gelozurinisapanavib.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///43191211056.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210928_C56CB05CB3C90A55.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/gojigajerolidopipejetasam.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/21427647118.pdfIn PDF document text
    • http://yuli-china.ru/d/files/gikedupotiduzokagifel.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/sajinagomalavizupe.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/73588087881.pdfIn PDF document text
    • https://smgbid.com/ckfinder_userfiles/files/sumumazodu.pdfIn PDF document text
    • https://arsenev.verlauf-ekb.ru/admin/ckfinder/userfiles/files/9655600550.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/psvhvn0jvbacqgd6oto0s4smbr/13099628710.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/29662875468.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=principles+life+and+work+ray+dalio+pdf+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 10808 bytes
SHA-256: dd37087bb6bd3c38aeff7fef308c5bd23ea5f0709254071bf63589309bc8b520
font_01_sfnt_off000134a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB6 20964 bytes
SHA-256: 5d3267906988c5cd33c5ba89e8d0c1507ca10875a6a22f5a9a7e02c85cc5986b

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