Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3070d7baf666270…

MALICIOUS

PDF

78.6 KB Created: 2021-10-08 11:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 5ce24702795abd2a311639f9545d4d74 SHA-1: 48cccdb95b28252eac46162380134221f9cf64ba SHA-256: d3070d7baf6662702dad3c699d8f1b2db7d410a1799d35d7a5cbf8f0291ba3d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to a link farm, suggesting an attempt to direct users to a network of potentially malicious sites. The PDF's structure and the presence of multiple external links indicate a tactic to obscure the ultimate destination and potentially distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b40fd9e611159fe4fcfd7ba1b57e89c5/46842911975.pdf In PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/dutezofaxinebo.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/19266063893.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/ponufuruzakukuv.pdfIn PDF document text
    • https://ordermorestuff.com/cmsCart/upload/file/55707271191.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/82901767387.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/zanirovufopomexo.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/wodijatibuxobatulenezu.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/fapiralevizogupuj.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/bofitupilotawed.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/8c9e1086a867a9dbab319bdf73ed4ca7/teduromeworovofagegok.pdfIn PDF document text
    • http://parkingparts.com/Upfiles/file/wawamosewizotofewogis.pdfIn PDF document text
    • https://alpinashop.rudy-ra.com/files/46474340845.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/85938167349.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/jobulijutumatudof.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/43806158639.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/52654011116.pdfIn PDF document text
    • http://dongphat.net/upload/files/37455875467.pdfIn PDF document text
    • http://app0.linkeo.it/ckfinder/userfiles/files/66987310916.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/kefuroxumi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=distinguish+between+extrinsic+and+intrinsic+motivationPDF 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_off0000cdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 17368 bytes
SHA-256: f10acdce4cab3f8f8984d3c45dcd866c47fbd8d518b29219753c43e135e34215
font_01_sfnt_off0000fae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11300 11264 bytes
SHA-256: e6c35f93e72bfbf136496451bb81647ef6ccca2ab17e4e5f442dd4dffdae1a1d

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