Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f17cbce2317283…

MALICIOUS

PDF

87.5 KB Created: 2021-07-22 10:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 791d6121b57a4e80ddec7324552571e0 SHA-1: 13b10d7703010b660caaacb68a52336ab819e71f SHA-256: c2f17cbce231728335702d1eee22bd0ea89a00ecadab63b432caa0217bcb55e8
204 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external links, many pointing to potentially compromised or disposable hosting. The 'Browser extension / update installation lure' heuristic indicates the document's content is designed to trick users into installing malicious software. The embedded JavaScript likely facilitates the download and execution of a second-stage payload, contributing to the overall malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allasclub.com/campannas/file/66882604450.pdf In PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607153fff1fbf---vozopofipojenu.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/2g259p1bnd4l21tdvoh73l90mj/kimoruwemilojavejagol.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/47923856467.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/98742370760.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/68006815602.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/97486326640.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/lupozojukadawe.pdfIn PDF document text
    • https://bczenekar.hu/files/file/3595714260.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c0bc6035764ac6747abbcc8e2e5a65c7/sogonuliwigovepe.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/m9rcocsisrjh4n3san019a4kc3/39812891443.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942ec5a1884---20046633622.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/fofozopajinapezalepori.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b0e969214b302fc69786c6c8f4839a8a/jexisumomejujigegok.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/fajomajup.pdfIn PDF document text
    • http://gasnguyenanhst.com/js/ckfinder/userfiles/files/80925502931.pdfIn PDF document text
    • https://luminex.pl/upload/file/84476375862.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210722074520668679959.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/bewuz.pdfIn PDF document text
    • http://mobilenmr.com/files/files/39164644617.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1j7m74dbvvldl65pph7loia113/bojopapodedetijemavut.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com//ckfinder/userfiles/files/gagibive.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/wejobiberixagarifaseg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=office+2013+download+64+bit+crackedPDF 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_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 11356 bytes
SHA-256: 8d0c6a2a4ee51f3663d3fbb7c512fbc791bb3588c38e9b9c6967f4e6fd9c757f
font_01_sfnt_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 17648 bytes
SHA-256: 1f5555af238bcc74db46cba0b0785b89dc38233ae6b307aa55b07b8645bf7106
font_02_sfnt_off00013838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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