Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ca06828f326b51…

MALICIOUS

PDF

73.8 KB Created: 2021-09-09 18:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 40cd8398edf7c5daa8f2b406e829df80 SHA-1: ec3d15fcd9ec4fd6ea1ae4dc4b8fac9d95a49107 SHA-256: 74ca06828f326b5137493dfa2901bf8a8d201a422976f705e411909f1c066d82
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=311+parking+enforcement PDF link annotation
    • https://elemental-ia.com/userfiles/file/58116489181.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/pavuzukikufemesuro.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/relugirekowaleko.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/80461264101.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/tinuzobin.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/26268027301.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/49089649780.pdfIn PDF document text
    • http://sjanzee.nl/file/21742931479.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/35686206140.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/52239631695.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/85550713641.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/gaxejipumugirat.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/tebebokakate.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/85429495948.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/kipek.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/37503988713.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/57581650085.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/94479561676.pdfIn PDF document text
    • http://househouse.it/userfiles/files/35762551977.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/38989457582.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/18596357217.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/bajawokukuwageginapiru.pdfIn PDF document text
    • http://thietbidienmpe.net/upload/files/85752494994.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/45107875485.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_off0000bd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD23 10828 bytes
SHA-256: 299426c90b15ac3ef1dfe882b641d3ac3859a0cbf3b894dd33746f9f996f9331
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 16652 bytes
SHA-256: 899e2a35c581f6cdb12d34260cdf7860b8262397d8e7958cff0cdffe2d5a0a12

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