Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde4fbc0cdc3ca3e…

MALICIOUS

PDF

91.1 KB Created: 2021-06-30 04:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 23f2ff8786c16320d92ff6efe94fbde5 SHA-1: ac3bcb1ebd60554f795a3aafdbd9623b0cbe54c7 SHA-256: cde4fbc0cdc3ca3e2c565e76a2ab4cff5ab5f19a004a89483d440a502b2e79b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and link farms, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=harry+potter+chamber+of+secrets+pdf+download PDF link annotation
    • https://skyzoan.com/cake/beta/userfiles/file/ximebenoritilubixefijom.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/5d77c93f5ea7424a572abfd6619846de/81217753492.pdfIn PDF document text
    • http://bwc.lt/i/44222196555.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608359a242870---xojotatokalipozi.pdfIn PDF document text
    • http://parentini.it/userfiles/files/25761513270.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/sutijemefokagog.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/51467609813.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ee7r3rauaqhhobamb9n025iop8/kusufusipew.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210603000309.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160cd594f13df7---90357066855.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/gaxejoribojizubefulolerek.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c59b2883---94377397310.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/a3144ab0da8a436ee69cae778466f5ff/31492018156.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1304e3fe---85954928956.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/61569803831.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/wakoxesero.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/92341265656.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/b12cce29d5bc3162fd15c98d1c2bfeac/10144123133.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/fba4cf38013e408720e964ebbb1681fc/vepofujefagesodusuguset.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917cf3d8b4b---mifixanimok.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/15247312136.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/vobulelonanalezem.pdfIn PDF document text
    • 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_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11653 11124 bytes
SHA-256: 2f93d2170085a573968bd84d76896fe09eb543a7aaea05eb54b340c0ab69a91a
font_02_sfnt_off00012ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF2 17348 bytes
SHA-256: 4953a47634c38c7ec4759ff805c00db3ea3f2380a256c81768e373f73da2d3dd

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