Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2202ffb60aa8b70…

MALICIOUS

PDF

75.9 KB Created: 2021-09-17 21:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 003575498939cefbd47d9c9e9fa600b2 SHA-1: e7a2e17187512113c5d227dfa68db2649aaf223b SHA-256: a2202ffb60aa8b70b16fc14bd788eea38c7e636590d326b0d7afa291df72b0c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and structured as a link farm, suggests an attempt to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://iword.de/userfiles/file/wubutibogapafun.pdf In PDF document text
    • http://onlineticketreview.com/images/file/79269279093.pdfIn PDF document text
    • http://ned.ru/uploads/files/pigikopuvos.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/polidepug.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/pulaxerilezofetajim.pdfIn PDF document text
    • http://seamacros.com/upload/file/84782597578.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/pofixuxenokiken.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/19249317301.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/33178605402.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613453e24fc94---97955550836.pdfIn PDF document text
    • http://altus.pl/userfiles/file/bilenode.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/bukotogix.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/sefawuxegaleditipeju.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/lexak.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/23922208626.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/metewu.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/40189345918.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/77141369163.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/pidew.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/funogevedepikegurow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=apa+7th+edition+book+citationPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/20527968118.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_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 10560 bytes
SHA-256: f2a6ee7828a108b3fe5f49e37a864aed3dbcad8fc782f87b522c1ac1bf9a568c
font_01_sfnt_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 16880 bytes
SHA-256: 45c0ae28d85da64971714b48fdbd19ddf248045a18424adaf46923725550393d
font_02_sfnt_off000109ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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