Malicious PDF — malware analysis report

Static analysis result for SHA-256 f292b92561f4fb7d…

MALICIOUS

PDF

83.2 KB Created: 2021-09-10 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c1f6cc89c97ece3a3d9b81fbe96d0242 SHA-1: 660ff615d3216c125f8b9c99c5518d0bc0223739 SHA-256: f292b92561f4fb7da1689e5010f9a767d5a8a4cf0c488c8e4a5ec11e56f31e3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.hosotte.com/ckfinder/userfiles/files/26403585296.pdf In PDF document text
    • http://bftt.marketsearching.com/upload/files/54753441896.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/piluvojolugejuvine.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161322f808dd96---14255731439.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/f13sd4kqkkn5nrk04lf24iqr71/67726176787.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/88745088527.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/tavul.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/gedigo.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/jubibagor.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/kuvemigif.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/18776523295.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/balelubemonuvu.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55270761284.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/45101393502.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/73116767230.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bad8cfe91---30443847878.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/45273271164.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/19598504438.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/telurop.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109051208378078.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/dabf3fa9d43c9f3672558fe1fdd00512/76483983225.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/sobabuxexeruzexoz.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/bosolipameboweguworife.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210910205336_80p6w6.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=gate+test+waPDF 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_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 9764 bytes
SHA-256: f69709b3e11cee0c1d974f84e91132976aabe3f6bcdd4dc55c38765b381e3d73
font_02_sfnt_off0001106f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106F 18116 bytes
SHA-256: db9de8c3fcf5cd51ac17dd20d99b3f73fe58c7e9dd1df123454d18acca307a55