Malicious PDF — malware analysis report

Static analysis result for SHA-256 f299bf98b0c64b66…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 18:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3ab97fb9e0c58311425b1f7578318489 SHA-1: cb9249e96430f56d4e5667adcc701f5680c7d122 SHA-256: f299bf98b0c64b66b054e3ddbc722be32d45483b2bd15d4d640aed0dffac0114
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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=business+plan+for+small+restaurant+pdf PDF link annotation
    • https://tmtteks.com/files/tukupefumise.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/sevazudusazizesatanuvige.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb55c1e6e2---xobinok.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/4dbp0vsg0g7dgd4t7d63rj4fn2/wizalamipajasilaxafepeda.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/57050077219.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/bixel.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/55918547085.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/86334375624.pdfIn PDF document text
    • http://zae.me/datafiles/file/zojut.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079704e9ce91---bovafixijaravozo.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7iou5vuag1e0cvdgbd84kdr2u7/fekituzubogezexuwubo.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/72418918097.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/jb726pte3fdo9fa6p7lkba7nq4/73591896037.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/14922124750.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/54713304098.pdfIn PDF document text
    • http://friulanapanini.com/images/file/63984221798.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/70015324725.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c087641658a---2854281887.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/gurigixoxugu.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/faketojidevo.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aafe12da71---kasogoxikokovavajimom.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/bizupegavot.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/a05bd482e3fe40df778ca464ffba0e03/doguwamaz.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/577739525082cc149e1d97275f3cbcba/43720790125.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_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 17484 bytes
SHA-256: ffd3cdffcf4e45b40a6e2a1c34052edd6c7d072c0013f6874c0cdbd0e85bd92a
font_01_sfnt_off0001087a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087A 10812 bytes
SHA-256: 6a99480094f1d76c68555367cf1946d9f9e1bd7320c7b700da4d74bd59385ce6
font_02_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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