Malicious PDF — malware analysis report

Static analysis result for SHA-256 824c9e082c4dc186…

MALICIOUS

PDF

124.0 KB Created: 2021-08-10 19:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3ad7d6bfcab28de0fcc93a19320680bf SHA-1: 189329ae048a1a7fd84b5fd834c8d7e1e7a98aaf SHA-256: 824c9e082c4dc186003cb76a7e29c9c696e8f3c9fbe4b1faebc3e8e60fb7577a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://m2m2design.com/userfiles/lakufebog.pdf In PDF document text
    • http://manleyboone.com/clients/3/3d/3dd19be848c73b0ce3a0430f7fd535f3/File/kiligaxovigipemajomoj.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607903e481183---90228135455.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/53208381896.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e9acc489d4625600eb7aaa908d8e1d5f/93621442100.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d153b9ad8c6b59dbb897995b11e12838/14867686635.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0470075a7---95143635577.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071c4b99a702---nadudetuvuginifi.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/fedurexa.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/gasepi.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/9cc6204300c0a8da9aa79a39ffec780c/kegememilo.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a9bd25f45---68102830058.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/dagokoxisumekojujofizi.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/sokevatometakirufaxajeluf.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099960f76016---kozepodemozawu.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/87114155345.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/12248021061.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/89081632164.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/43801026453.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/jupoxel.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4451aa5dad---duvabewilexopidudepuguri.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2c3959effcfe3ff5f2242e3bab20e649/biwugelik.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/27471632737.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab6c288f79---dajuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=idee+de+mot+de+passe+snapPDF 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_off00017c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C4E 10268 bytes
SHA-256: 0a35a9edb4b5fb62b8157f59a45a3b4a4a1b792575613423c3ea97cdc06b6b17
font_01_sfnt_off00019365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ab77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB77 20700 bytes
SHA-256: 252f6d9a5b8f5fe4b43185d38ed02aa1961b62915c0c81fb2c11a3b7ddabf4b4