Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a48325701b070e…

MALICIOUS

PDF

93.0 KB Created: 2021-06-11 07:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 24bfe2edb35228a2597edbd4c34f3d4d SHA-1: 029310d9e303bbbfc3b62ef978a9c1b8cdf85df9 SHA-256: 22a48325701b070e76ba2fbbb90ac3dd585327b8168dbea0139c3618c8f512de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://catamma.ru/uplcv?utm_term=predator+2000+generator+manual PDF link annotation
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f334cce66e---2843584852.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b41b108e---kopiwawolafelimuw.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/799s3tcngglb5vjaum45sbkli6/rawilo.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/65141832241.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/713bcc4a96edf1f8524d09b4a3f9311c/nimonasojas.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/41899562901.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4475f90c---52770529809.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/zalekenulolome.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607443e5e0c6d---34189410351.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/duwukadewotitoziv.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/pavorizifuwagumumez.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/236d6b8dcb0acd9226bcc1d320c59d31/xajivadugogen.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/aauu0m8hnod3cu505m1o4mkd2k/44062745218.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/sirosozirefaxexi.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/26038623520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 5244 bytes
SHA-256: 1a98f5d2ccd142610edd397f409ff2be3ab3740de34965093de449cf610a2d15
font_01_sfnt_off00013022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13022 1936 bytes
SHA-256: 84daf345e21b08075a6e329eeacb0a13a0447ddcc3efc64e98a9a4ab9c6a9d9d
font_02_sfnt_off00013963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13963 13088 bytes
SHA-256: 3357f32528ec64d2d5f3812b27d98c23028086ccf238cf1698cf60cb71afb73d

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