Malicious PDF — malware analysis report

Static analysis result for SHA-256 2207769aa94b370e…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 02:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ca7e4850abb99639e4b20d25788175a9 SHA-1: e8ccea14366fcac77b38367646ff8dd73161da9a SHA-256: 2207769aa94b370e6c521300a3c9b83e9137296575802744d484175df4dbcd79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The file's structure and embedded content indicate it is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=alfa+romeo+giulietta+2011+workshop+manual PDF link annotation
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/117294d98d10292a03190616959568b2/11025241476.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/o79e3e1qnjqff9gum4fd264chv/jewuriwitefudoxib.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b968eb98950---winobaxipinizevix.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/18064746501.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/82pnvgessi3n9hambbkj2qkqdl/piwutax.pdfIn PDF document text
    • https://ancoraeducacion.com/images/giletimu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/fokegos.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/31389820857.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/2487163162.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/57125257923.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb21b60645f---49746254158.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/kexevix.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/98f2aee3d79a2685cebb9caed3e33251/20893997177.pdfIn PDF document text
    • https://mytopics.it/uploads/file/88876816144.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/99476536511.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/vejifupaz.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/samonaziz.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/logegutoropenumu.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/713f00c9cfb3db0a2b66d04e4b74963e/60673747803.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/sokodewofa.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/72772253138.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612e721a52ed0---zibamunir.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/65913731476.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/a14317cc8b4cb24cd233acb75b3fcc5f/jiwedim.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/mukukuji.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_off0000dd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD86 17468 bytes
SHA-256: e0e29691b76aa36f745aefd762263e9c1378f3b549d7a99859e85d41451c0edc
font_01_sfnt_off00010a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001229d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229D 11356 bytes
SHA-256: 4301d1ceab22c440208643f2af167fa83ed9ff40a0746ff2d12f7da636cf706c

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