Malicious PDF — malware analysis report

Static analysis result for SHA-256 37874638e6bfba35…

MALICIOUS

PDF

73.5 KB Created: 2021-09-17 02:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 69726a27e3119383efd567813be9ed90 SHA-1: b9dbb1034dcc41305aa21ae342bb98d1c6533be7 SHA-256: 37874638e6bfba35d74becc7ab0366fbea3c2a0f462160c82e942d973201b307
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be disposable hosting or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=nabre+pdf+download PDF link annotation
    • http://filtrydokoparek.pl/img/all/zudupigo.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/tumugoxijuler.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109161656012394.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-9/20210909170246545441.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/c6cf8e95e9b21896bffba75b9c0164d9/50358490544.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/nenepoxozurusuredudewuvu.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/12760165387.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d312a06026fd94eb8e3d8c2a35e65abe/44717774732.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/dowibafutepibumezusa.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/16393341277.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/79624271546.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614128b1e9920---89719512474.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/zokozogiwefijuvinuxe.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161366ab870a44---78485060180.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/dukurivili.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/18506370015.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/542e54060d550b39c985a2a03cc389af/fesuwosuv.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/16932181607.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/95727043460.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/tuvigaduzodupulumexamegu.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/60717688529.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137539b7a4cb---3353718564.pdfIn PDF document text
    • https://songhong.info/userfiles/file/gubomasukimoxokefarikupot.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/bunemuxazoxedapinavi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613519e94bdb9---82911903042.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_off0000ba69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA69 10336 bytes
SHA-256: a120442d51267db212b61a5cc02e02751a98c4fc956c164f2cc8a3211a22627f
font_01_sfnt_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 17796 bytes
SHA-256: 9ff639697eb238f9cd0e4eb81cd02aded4c0c41062e27d1bbde946ce82bf8e94
font_02_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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