Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c3d220fbc4e41a…

MALICIOUS

PDF

74.4 KB Created: 2021-09-20 07:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1d047f15daf93826de4e25d5c0a3d21c SHA-1: 6ede554cc5e075c34077baab8f25013b3c0b3cc2 SHA-256: e2c3d220fbc4e41a2e1f4f2efe3b79930c1ba707ff58f1935f49635588cba1e4
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and a link farm indicates an attempt to lead the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allivecoat.com/userData/board/file/60343111506.pdf In PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/0e7aa07a08090beb63c231d8ec6e249e/55625433145.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/77918986581.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/7738829950.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/72455003849.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/bikafur.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/ce0ab45714644b71380bbdad227445f4/88115833628.pdfIn PDF document text
    • http://zzquansu.cn/d/files/pizowuzuwawiwuzolotegor.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/45688722091.pdfIn PDF document text
    • https://businesslife.com/content/files/95336334661.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16144973574b5b---vaguberiwebimobumile.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/2d32c5bb1e7ea2c9c8a57f3000c38039/34765102532.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16147910d97006---zavuxonulugakig.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/lanisozapinedo.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/46158667595.pdfIn PDF document text
    • http://abpaluso.com/upload/file/ruvesu.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/vakuxivesas.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/loveped.pdfIn PDF document text
    • https://borsalino.ro/imagini_ws/zusexizuwagipuruk.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/97640956968.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/54485026029.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/19503859762.pdfIn PDF document text
    • http://cityfate.com/files/files/sejemalixinirawip.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/gevegoderadanim.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/gapowedobubu.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/pezilagulisirobu.pdfIn PDF document text
    • http://accronline.com/userfiles/file/53466900449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+war+chess+3d+for+androidPDF 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_off0000be4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 10732 bytes
SHA-256: b008fe2f8c7880752a02cdc2423454a34f6f84d0447a2485370be7e107bb808a
font_01_sfnt_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 17340 bytes
SHA-256: 4a066e1aa0c36f515a21ccd7ca2444091e7f8e91a49c6ff64f07ca8c7b402912
font_02_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1