Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b629f71dc4b70…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 14:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6577adec2ade5b391db37a119e828114 SHA-1: 4229cb8b35e6d85d3330c055a5b4e55073be14c7 SHA-256: 2f0b629f71dc4b709cd8e3b6499c7d74832a6e481a1fc8e609b74ca7ff1b8455
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are flagged as unknown or potentially compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs and the structure of the PDF suggest it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://homeopathyhongkong.cn/files/66514466788.pdf In PDF document text
    • http://fzsvybbs.at/userfiles/file/74886711889.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/vawerifelu.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/93065371583.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/pokisato.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/darujonumotabukal.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/39443582287.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30222150732.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/36498247321.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/465811e63ecd6a55c890244b97e2dd8c/64013078425.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/4f912063b404c5c52b28add4a1ad5ecb/96105498333.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/80525830187.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16130301e46c14---73143735161.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/69811516776.pdfIn PDF document text
    • http://kelsenator.com/userimages/78116768903.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/tq63o9k7j1gkum7j2bjuebp7t0/39139767197.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d7ae1ce6c8---mavexozemono.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/24776376726.pdfIn PDF document text
    • http://dominant.name/userfiles/file/kizimeripapejijikebepo.pdfIn PDF document text
    • http://progetec.org/userfiles/files/77144020213.pdfIn PDF document text
    • http://rococosofa.com/files/files/dajebosixelorutebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cash+app+apk+download+iosPDF 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_off0000dbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 17688 bytes
SHA-256: b2dba249dd0392930cf50c7dc24a515bfc6e279c0e1ad8467eb61dbf5db9cf55
font_02_sfnt_off00012190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12190 10368 bytes
SHA-256: 6fb9f5e6c7e6766e0ada699ab0115150629d31d7c472edfd6d355256980db7ff