Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea33cbf3f2a2d31…

MALICIOUS

PDF

93.6 KB Created: 2021-09-15 15:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aae51f3a595af63f6ff71ddc7513eb86 SHA-1: 810f668feafdf3b297af5d71f7449a59ee58d896 SHA-256: 5ea33cbf3f2a2d3130c3645caccc40350828ebcd5841cbde2e9cb656c7299964
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to numerous external URLs, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute further malicious content or phish users. The presence of a 'download button' lure reinforces this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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://ibexquimica.com.br/ckfinder/userfiles/files/fetofebedor.pdf In PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/91291496926.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/68163057902.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/40063072937.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/mozole.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12049417024.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/fojirijilu.pdfIn PDF document text
    • https://hkki.org/userfiles/files/54734749548.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/f203fb6dfbcc5958fb95379b19147179/budeli.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/bizebaxije.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/mugetugalive.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/85890676010.pdfIn PDF document text
    • https://chv.vn/userfiles/file/lebesalaloposizazu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/93df576e57e7dbda35d7a5d85126e444/lejigejirutevulis.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/2738920807.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/gizejuxisegu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/230b20947086c415f7afe7eda086a4d0/53365456100.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315ca473df3---moxepazozuworunapipiv.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/mufololiwazoxineka.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/4994634778.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/89014158917.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/fufukobonoxufusanep.pdfIn PDF document text
    • http://hocomesun.com/upload/39573320112.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/jubixujexosupovenam.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/lipagosuxegoxexe.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/74888650760.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136d4d5a7f07---41326030967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pubg+korean+version+apk+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 19216 bytes
SHA-256: e7b4b2ab6c9e43dff391c2305868a603d080132db296bdcc4d430fb8cf0b1723
font_01_sfnt_off00013680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E97 11060 bytes
SHA-256: 0a26a48927284bbb4d4bbebd8672831cc65337c6dcaa013984aa631db1ad7891

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