Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e9ebcb7e7c994f…

MALICIOUS

PDF

85.5 KB Created: 2021-09-03 19:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 622167096c214579630cc58656ac88bb SHA-1: 5d1306ca25988facbd71565888d906ad5faec7c3 SHA-256: 72e9ebcb7e7c994f1dfb5413f304bcb9c8103edba1ecb621e8d69ebbf9220ae8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, which are likely used to distribute phishing content or further malware. The PDF's structure and embedded links suggest it is designed to lure users into clicking through to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://abpaluso.com/upload/file/bikagirawijoruwaxoruzod.pdf In PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d5d3b56711455ed46a02129c80fc6c24/rakisojixuren.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4b45ce3a6---92010048388.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e2610f136a5effb93adb557cfdef9eff/guzatowurunelen.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210701014740.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/v7f9boegep6k958jnlmad1n3ng/5984368345.pdfIn PDF document text
    • http://446888.top/userfiles/file/derowunugekuduxip.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/zupoxojimikemapupogojow.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/50994538858.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/jebarijowej.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f0db750bb9a---pudegu.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a745fc0b770---kegununevales.pdfIn PDF document text
    • https://hurtowniaroza.pl/upload/files/xalijefo.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/girosenifevaropexubaki.pdfIn PDF document text
    • http://bangkoksolarpower.com/syner_upload/images/files/nigenazinarug.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cda0a02ae---wiwivozimorejoxol.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608276250701f---21160973166.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/91615865816.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/678ae7ec13a0013e4f8d1b33e4e2740e/poresodared.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/40306691525.pdfIn PDF document text
    • http://capthepcongtrinh.com/uploads/news/files/kegixuxovug.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/vazuset.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/so2gjq2i3am91mc41m6492tbmm/8530849599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=comprehension+passages+for+class+5+worksheets+pdfPDF 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_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10047 11412 bytes
SHA-256: 46169ce3bb12d9281d123526ec40b68e5b480a5b14e395f4f6f5e05eb63f7a7a
font_02_sfnt_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 17604 bytes
SHA-256: 89480014023da7014e7acd323e87c00f0c237edce0aa068ff9f6d9b9f4b00e31

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