Malicious PDF — malware analysis report

Static analysis result for SHA-256 584130c732f6fbcf…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 13:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bca7ecadbf6ebc9852799bd7e9fb912f SHA-1: e68712117f1019fe80b89b52afa02811134e0548 SHA-256: 584130c732f6fbcf49533e4da1fd1dd6fd8d15fa8cf0e873638900bd3f01b5be
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fotobolfestmeny.hu/mvc/userfiles/file/rozaxubaf.pdf In PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160721c94f097f---90587924145.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/e7a7bf80aa3c1585ab45ce903ef215bf/buveda.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/bemomiboxo.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/76172606905.pdfIn PDF document text
    • https://tl-systems.hu/files/files/54702893680.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///34366423360.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/2978071307.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e50d4d8511983d17f6b3fe814d867cdc/gosutiponumojugego.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105080424.pdfIn PDF document text
    • http://printific.com/images/contentimages/files/22575568274.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/zejorukesen.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/17701377704.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/60159159171.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a28d951b83---mubadevugoduva.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0841664001625179099.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a8e162e39---fenotetodezajalije.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/52780518804.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/nepeduxaxonam.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/633c9c775dd7f57795b33f60e4a2f025/lewiterabituru.pdfIn PDF document text
    • http://weilandensemble.nl/ckfinder/userfiles/files/zefazefuki.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/58b21e12db4c171d7f4f583c855e78ae/46269178619.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc69849498---mowuzazovorafolarolodogaz.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/0b28267406e4a0ec8e219457f75341f8/43444269762.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/78681224887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=chevy+ss+2017+manual+transmissionPDF link annotation
    • 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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF211 16532 bytes
SHA-256: b2d6fd83dc3b7b8322391e588e64d5520c93dfa70d7192f4f1a3723b6c945a6a
font_02_sfnt_off00011cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB3 11028 bytes
SHA-256: c579db3c76f4e90d09207210e2677b48ada8c525b8c48ad02e5607c9a3cfcc17

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