Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c06f274ef14af5d…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 20:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: addbbca5117b04790f1550308fb2b9a5 SHA-1: 5a58a23f0c7ea3d233114b7227d79195760e5ee7 SHA-256: 3c06f274ef14af5db119547fea810889351d0e2a2eb3c55a81c6b0e1384071df
196 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains a social engineering lure, instructing the user to install a browser extension or update, a common tactic for credential theft or malware installation. The PDF also contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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://xn--49s538bo8ux8c.net/userfiles/file/motonelo.pdf In PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/64855222129.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/ravutupodu.pdfIn PDF document text
    • https://frigosztufi.ro/ckfinder/userfiles/files/pixujisuxewunamomesafi.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/36832381639.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/34b28fufarm7cjs4p0fbd1rpmt/82397702083.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/87632227558.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/vejarozas.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/ruliruxaxopudekux.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/kulajitif.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/71265583708.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6f989e397---51800166874.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210911063733370.pdfIn PDF document text
    • https://neurondevelopment.org/userfiles/file/99345858959.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/51401795362.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/70385575622.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/lubisezamo.pdfIn PDF document text
    • http://huiking.cn/uploads/file/010406425969.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/kumilejesakiwomoxeg.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202109100406236077.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613188b8ed673---jozutuxoxibadizuboru.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/20054036039.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/lefaxakajuruxibamoguvopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=uc+mini+apk+all+versionPDF 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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 10604 bytes
SHA-256: 9e1a60e2a5fc99be910378f851e5d0b8c0cef677e9b4f8c5ea1c395bb3bf7f6a
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 18104 bytes
SHA-256: 13afa3559f7ed4b6e34250a9f663e63f0da2d0045dfb50f4e02b529921d4a8de

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