Malicious PDF — malware analysis report

Static analysis result for SHA-256 008149f9111ee66a…

MALICIOUS

PDF

90.2 KB Created: 2021-08-07 10:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ffce85bac7d4c7416d35e00db8e9bae8 SHA-1: e6960eff7cb874528df788da06414b23517b250d SHA-256: 008149f9111ee66abdd0cc6504c7b6314169a530c1c90c2a830889b04ea27b38
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting domains. The presence of numerous external URIs, including those hosted on compromised WordPress installations, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=geek+pub+arcade+plans+pdf PDF link annotation
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160be91642f99d---74753418174.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/2603328042.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2c3dc218d---13265013048.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160862c66dc470---3275342452.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/26050919276.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021062700562573499.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/81374032278.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8bdf247f9a18f2a95b593e3ca1a2b691/76459466726.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086305c58f79---disawezatazivunilax.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0704c547f---3096863029.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b99fc2a60b---85303484971.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/virazirebererugabe.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/93719535950.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/wewuzoninejidobilos.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/6000493779.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/97623501226.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/64524741379.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/095aae33baa0e2da648605c551b06cd0/46249278959.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vafimewufenukitovugisevu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q0j63tslsrh349ju85fav9k17d/sexuzabodarisi.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/flvtchjkvsden047mek5im5365/delotowarimanapefuboziv.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc9a60d1f---87062876699.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32229534271.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd957800b84---78395393736.pdfIn PDF document text
    • http://klpa.net/userData/board/file/79490886726.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_off0000fce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FC 10676 bytes
SHA-256: 4c4acfcd42fe256d0db860e154c5378e9cb5eb7200b23767e2647a33749f091b
font_02_sfnt_off00012d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5A 16896 bytes
SHA-256: a7ffb452b7504742c93dcd3d7dacac3a434ba3d1b0354554a411cc6912c0632b