Malicious PDF — malware analysis report

Static analysis result for SHA-256 6193d650de8c5ece…

MALICIOUS

PDF

78.1 KB Created: 2021-09-05 01:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cd262404e536609f0f2cbdadd61b6dec SHA-1: a6a1517a33432905431f99d518bd8613cd007d2c SHA-256: 6193d650de8c5eceb638884c9c8466e46449fb7e368407744dd46a48f43f33e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users by directing them to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://spamsmsgiare.com/media/ftp/file/garuzege.pdf In PDF document text
    • https://adikkeempat.com/contents/files/madukodotavixozakuvizutuf.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/52103724166.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b719af1540a5b6fa9067c947b67ec250/973570886.pdfIn PDF document text
    • http://df-foundry.net/d/files/bomijalugulusoravetasupa.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/daperimogodovus.pdfIn PDF document text
    • https://doganagolosa.it/file/wuluxiketup.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/51444955902.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/larafozedikaxixolonuw.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64cf6a4df6---sosozuzumizogaduv.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/67faa4dcb6fcaa2f39f8ac2c316d1f6a/67724204185.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612d68ceeac19---digelufux.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/fuwezikewokiguz.pdfIn PDF document text
    • http://irths.com/upload_files/files/19798350578.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43924b5561---jufosag.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e587b1d61---99159219506.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/b30c0fbf15eac2ad7ca5e54ba78e1a4a/jiwalijaxugivevosig.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/25609469249.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a48b8c3f0---rurasaw.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084e69ab6ed2---wibimij.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a956645551f---59491396483.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0ea3bdc48---98857096892.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/rimarutumofa.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/wunuxujijene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=actividades+de+sumas+y+restas+para+segundo+grado+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_off0000c92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 11180 bytes
SHA-256: 26d1ecda35c73d738d35379d318e2b184eee9749b2ae586b42d307bf80dcb653
font_01_sfnt_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 18364 bytes
SHA-256: 9310f57d1228cbf8433913680e0e0c14aeac5c82339df24db54acb67c1b72f40
font_02_sfnt_off000111f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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