Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8c96d0c6e1b3ed…

MALICIOUS

PDF

75.2 KB Created: 2021-10-10 16:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9b8e09f811890810c2c20e0aa100994d SHA-1: 25e2c9cd3364434ce2f0b80748a696a297f49e5c SHA-256: 1e8c96d0c6e1b3ed4ae75da1886e87cdaefde5b47f898f05ea6bc752b970d3dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or low-reputation, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.bevillelecomte.com/ckfinder/userfiles/files/ripazinupanuliritarobol.pdf In PDF document text
    • https://thefencedocumentary.com/adminfiles/file/nepimubotojuju.pdfIn PDF document text
    • http://olguanaokulu.com/upload/file/jativalexorokifa.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/81743857629.pdfIn PDF document text
    • http://kids-ex.com/images/blog/file/83096044470.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/41949895813.pdfIn PDF document text
    • http://greenld.com/userfiles/65875574722.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/koxeket.pdfIn PDF document text
    • https://insp.biz/img/file/gugamutojonodusirofukumul.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/10044949663.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16141dc52aa842---93915809541.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/58759101247.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/615a2724620b3.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/sixolafizuxiniva.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/biwazematudotowerim.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/30762600474.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/timosijixalegipejukol.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/zobemobinak.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/buwejelimizokupo.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/fovovibojopemunokudo.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210903_D917C71C72EDA2CA.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/23817045633.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20211006205626.pdfIn PDF document text
    • http://kultura-vyazniki.ru/sites/default/files/file/winijuwevorilinojodavedof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=can+you+edit+a+pdf+in+wordPDF 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_off0000c345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC345 10608 bytes
SHA-256: 64494eff44014f5c01d313cf5c55e450bd58fad4900b1a90d4c61a5a8bbdf158
font_01_sfnt_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 16884 bytes
SHA-256: 786fa42c21fb131460adbaa7a322d20e185cf059e471b12c2c99ef2858fe4db3
font_02_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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