Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc326aa06854888e…

MALICIOUS

PDF

87.4 KB Created: 2021-09-14 05:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 88d4e1abeaaa0dc2337dfae547b97e1c SHA-1: 887b3fede08685cf1b6b5847366d4f626913f06d SHA-256: bc326aa06854888e4149ffffe1607b88c5287f912ce9b6e75645dc39372069cb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wastran.ru/uplcv?utm_term=zack+snyder+justice+league+full+movie+online+watch PDF link annotation
    • https://deltagroup.bg/uploads/file/3316128294.pdfIn PDF document text
    • https://regenerateacademy.com/file/61469606394.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210909110545.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/48379902699.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/peripatop.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://soc-in.com/data/media/files/25400923337.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/sawurixikekoragezo.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/wudepiw.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/bolafekarilositokomemituk.pdfIn PDF document text
    • http://seamacros.com/upload/file/84789004112.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/sexebebifozazatavojagasib.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/cf8f7239ba00362dc95a8246e99d22d2/22217129683.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/delinirelexuxejiwodome.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/86564307906.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/boxovonaworaze.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99993977464.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/tunivituzonixiwiwifefatoz.pdfIn PDF document text
    • http://xtra360.net/campannas/file/39893501910.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/meladup.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/bakugamurozaxuvosilem.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 11476 bytes
SHA-256: 545a3e91b17b6bec77226f39f6b9ad5a3fd6880f09e13a6af0af0b617ec770af
font_01_sfnt_off000106c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED8 18600 bytes
SHA-256: aecce1a3b565565bb9350b47f3b3aab95fc81f89653c052c463137fbc7e14dbb

Open this report in the interactive analyzer, or submit your own file for analysis.