Malicious PDF — malware analysis report

Static analysis result for SHA-256 589dfdad4d7236fa…

MALICIOUS

PDF

92.4 KB Created: 2021-08-08 18:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ce46e71a2fdf607f4377cda15244fc8 SHA-1: 9643e568afa05b5ee3aa9a13d6d0e3c12c33173c SHA-256: 589dfdad4d7236fa49f396026ddeff3d7c19c0874923a0fde8dd9c21cdca8ba2
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 numerous links, many pointing to compromised CMS upload directories or disposable hosting, characteristic of a link farm used to obscure the final destination. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://poolpoint.be/uploads/file/78931721233.pdf In PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2cb644e346dc3fe67433fb7e2e8565fa/luzoj.pdfIn PDF document text
    • http://mobilenmr.com/files/files/72236450342.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/g8ais4sgjcbcj31bjb4tqa6734/faraxevosavoku.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/damejusibod.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/zasil.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/11951378435.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e164676cb---17584694887.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e3012a25b---32036824754.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/11310910858.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/74508080849.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/pl0idbfq1mpm3s2bd4lsq86q35/wuzudarugabezezi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffb7e73e7---ganosaxaze.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/hkkm849c7hags9qrjpcddc3blm/55092702273.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/mativaropujesinexowakonug.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/okg4a4prcov87uhings509g4pn/74911275195.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/runavinegejufox.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aac93262002---lawexivizi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a540e078c9b---42385355740.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/347318b6c89f13df1930c2f1edf50d2b/tujujerikofowawekesif.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/62812996221.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/29675858488.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078750bb32f0---28754118156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+clear+codes+on+cabrio+washerPDF 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_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 10684 bytes
SHA-256: 64d84b087daaa716518ba1c53ce5ba20716f222abbeb79adedacc965b01db10f
font_01_sfnt_off00011e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E26 17112 bytes
SHA-256: c8a34b989951718dbf05d71aa9b514c71edde4ef13d0bbc4e6dce3d56adecb83
font_02_sfnt_off00014a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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