Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6547c98438e399…

MALICIOUS

PDF

72.9 KB Created: 2021-09-06 09:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a4539385bc1305711b2dad001d1309ae SHA-1: 33d6c548f813714995875ea8b16480ae3db4119f SHA-256: be6547c98438e399da65ebf895aa4bf495c2c62eebdbeacf5be55ceef10e65f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of numerous URLs indicates an attempt to redirect users to potentially harmful sites.

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://philabc.ru/uplcv?utm_term=ramayan+ayodhya+kand+pdf PDF link annotation
    • http://rklatex.com/userfiles/file/zakiwilabuzu.pdfIn PDF document text
    • http://halaljones.com/uploads/files/raburofojamoxakugarer.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/jozamoxusonudepiguber.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/94ab5cc5383485490d3ae32673ead503/livuxiwaxenowigo.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/kobitozisowarabonob.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/69750308589.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb035532409---2767098009.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7e3612e12---daxun.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ghoclnt6ji5bik1jsa24hbr4bf/55560795308.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/719795abe8c1d0f865bb1db7683896d1/38981799373.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/37483523926.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/22874511579.pdfIn PDF document text
    • http://cuatudongbinhduong.net/uploads/files/75960182882.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/zufowifa.pdfIn PDF document text
    • https://telorgabus.com/contents//files/nowalota.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/39181846652.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/pavuzatokilevibe.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/93595081837.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610d551becc04---giwamaziwubag.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/jevunovonodijibamis.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/24766778820.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4b2c1bfa6cfb6ce0c1ada9c0378a5a02/24665642195.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/fominorazodil.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/c70237dce0536944da700f8889a70217/lalamaluvamawama.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/67775303456.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_off0000bc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC43 16556 bytes
SHA-256: 1f23d0121778a59997b829ccae8439373e9d6a1a61109721c434b82f1c189210
font_01_sfnt_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 10376 bytes
SHA-256: 6670375902291f314acfbe3d442871c475f70014eff2be3fc49dc97ef6d79348

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