Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2bccade0df694a…

MALICIOUS

PDF

83.5 KB Created: 2021-09-09 01:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d6f463ac6023e6a95a14ea6c3cd8a9f SHA-1: da014a1db8cb68b30143dfeadbaa9373119b81a2 SHA-256: 2c2bccade0df694a5360342cb50d14a509b581515bd67f361a6a2ff6e8db2400
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://crysiq.ru/uplcv?utm_term=curso+para+formar+monaguillos+2do+libro+pdf PDF link annotation
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136019831f1d---55871875974.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/pelulutov.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/80122003689.pdfIn PDF document text
    • http://skisun.it/userfiles/files/zunudeweredibasezoxadekof.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/mugumiwamozubusuma.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/2224811411.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/jobawujupexofivegifit.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/43835085737.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161338acc32603---xutasuwa.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/74878076889.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/wuxusuxexa.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/ronex.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/bilenixe.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328b9440484---dedopa.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/nedozovavodimitido.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/78222335582.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/93990759928.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1630946052.pdfIn PDF document text
    • https://intersat.lv/files/file/97937109484.pdfIn PDF document text
    • http://insei.eu/userfiles/files/mipujikavoj.pdfIn PDF document text
    • http://globalbizkorea.com/userData/board/file/virojezizonoguzopusuwew.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/xunejowejitesedomi.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/napitaxe.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613870559cdc6---nomisitezuzog.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/15509118177.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/wakutetodawigaxa.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_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 11004 bytes
SHA-256: 25fb545352cabab6e312e5e9e04849e12a0df678591de273b07a08d8c87c6ecc
font_01_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 20092 bytes
SHA-256: ac7bab5eefd6f8f6eba441aeace7241efbace15dd537e9a91589c5a611391654

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