Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6015171981b703e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 07:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2cd04ff2f567d011f3d93d3735276334 SHA-1: ff5f62d85ec9ba03e6bcdc670c15fe663828f3cf SHA-256: f6015171981b703e04a15863f4987c3003db35ecadfaee4b1cf1f81e6667e585
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=how+to+use+phone+as+computer+camera PDF link annotation
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/zitokozabefudef.pdfIn PDF document text
    • http://quetthe.com/upload/files/sipegegizuzatexikikosevor.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/16271693970.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/25153992773.pdfIn PDF document text
    • http://gibisch.info/files/files/motebewulirurepebalozuto.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/nidofapujufuzijelafe.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/71451109782.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/11224380809.pdfIn PDF document text
    • http://cityfate.com/files/files/tesepamorixaxugaf.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/kujikedodifaxagixajitu.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/6839158262.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/9383901509.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a48f5dbeee92c8999d48c3831c74ec5e/3621658437.pdfIn PDF document text
    • http://szcftz.com/upload/16505425299.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/vitiwige.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16135f30f4a9ad---gudodama.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4fc0878d---baxejosudijowanikojo.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/74739480813.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/zamitij.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/39735974470.pdfIn PDF document text
    • https://bnovum.hu/downloads/63203416560.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364d69bbc4f---11671757854.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/59245833442.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_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 10680 bytes
SHA-256: e371603438d5fda06275225181c245335d262fe35885b951ef9e153984e83e84
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 17728 bytes
SHA-256: a1fd5a97160350c998fc5f16bb6eab74b1189dfdc3e6bb8d24031276e5363afc
font_02_sfnt_off00012716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1