Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2066094bee090a…

MALICIOUS

PDF

85.7 KB Created: 2021-08-24 09:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dba9afdb27cd85805d637e26c3afc801 SHA-1: 50892c6da702eef6fc5199892709bf4eca9a984b SHA-256: ee2066094bee090ab7d7281726f8948a3c699f214c7adb6a96ca3ec72e15aebe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised content management systems or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://medvor.ru/uplcv?utm_term=voice+keeps+going+hoarse PDF link annotation
    • http://vladjurnalist.ru/archive/file/42820906990.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41cd5f209---tarapowikinumomabufises.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/68014732850.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/47157057826.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/gugukiraputilawu.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/dizavurulevefuxumun.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9ni188sbg6gdh4s07d2b2ec6u3/9013785580.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/kavupurelafoxojegege.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/16537867884.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c374d8589d9---mikotoxonetutalemijezu.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/nabitolimiforadupoxugijuj.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/bopizonewigar.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/lopus.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bba43e8fb1cb5435769f96cf9ed5e4df/83250853911.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/22696870817.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0df22732a2ce0332800207ff9c7a56bf/xunisawazilejo.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/lanijagukisub.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/zizajisejugozagure.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/16145350873.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/772444a9f8c5da3865f763320ac0710e/movukunozewejoguga.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/75300448577.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/guduvemuwijirazu.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/41728288242.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/7501870458.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_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 16360 bytes
SHA-256: d27279654c535ba934ed0dae5ef5c2bbea30ba784470c103ff0c17a724ec1f5f
font_02_sfnt_off00012e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3E 10568 bytes
SHA-256: 1a9f01ae339bbe21a314c9e5409f916561745ea9f8e0e33da9482c7996da3704

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