Malicious PDF — malware analysis report

Static analysis result for SHA-256 d69951c3a1171288…

MALICIOUS

PDF

89.8 KB Created: 2021-07-30 17:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: ce4484bdb529e125a36144e58061e1a6 SHA-1: 8f184b2ff7a3be8dfb0ac083aec987e941dbf1b2 SHA-256: d69951c3a11712884e951f4e70a964d0937446e0ade12f5cae0dc92900b80290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://irlanc.ru/uplcv?utm_term=can+you+spawn+a+jet+ski+in+gta+5 PDF link annotation
    • http://jump360.co/upload/files/20210707054215.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/6445c7468faaa48ee63de54a9b1277fc/kixumewoneg.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/69174956828.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070a6ddb7241---bejenipotofo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c60d2399fd4---77411726112.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/robulon.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/fededipemudilugapajakem.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/tesiforuxaviraku.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/97621811797.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/39310837733.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/itgk4kfupamra3ks2skgp6c9uj/15049884607.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///zutunefuropuvuvotikotojul.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a053486e7ed---dimeliseguwuwivebetumofus.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7ecdb3cf37---91676859540.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/54de327d2cfdf579986084827a49d2a0/49918869660.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/91c2e6d1adfa9a39557f5d796915c7a9/65606091322.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/zodevutu.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089767c9b9d2---64711433729.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/pakenoz.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2e45d6578---rujanegakivufafejakegiji.pdfIn PDF document text
    • http://93564497.com/userfiles/zoketepi.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/bawope.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a15fdea6ca157704ff6490d1129527a7/pizukajoro.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/89593506686.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_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001111b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111B 10968 bytes
SHA-256: cd40fcb49773d7e9d0df88af4370a5d988a8297a1516a9ef7242e2642619a6b8
font_02_sfnt_off00012adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADC 17660 bytes
SHA-256: b182ba95d013bd81ce1fc597a9b4aa27daa8c0ecbaf28ccf573d4c5a73090da2