Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e6e9a4d8f116ad…

MALICIOUS

PDF

74.2 KB Created: 2021-10-08 01:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd3ed0f7e89773eec9ecae8fed01fa0a SHA-1: 198b6e6a45cbe703c66a11d0095de1e573488f95 SHA-256: b2e6e9a4d8f116ad6968b611e4b5fef5183af1c5246d23ce542b1e99f66937ed
166 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs pointing to disposable hosting, forming a link farm designed to obscure the ultimate destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nomylo.ru/uplcv?utm_term=can+you+put+electric+blanket+in+dryer PDF link annotation
    • http://ncdesign.it/userfiles/files/narimoga.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/leziwefeb.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16155dd7077f72---vawefu.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/996o1fi7ctabfjsi8vdqelbeg6/gududegibijexobulunokoxi.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/xedejumewegegufazekamokub.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/pojurigisa.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/12109514065.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/kajorefufezugajosekojolu.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/42879269657.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/59548298088.pdfIn PDF document text
    • https://ocw.tw/uploads/files/fafoguxikofon.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/19590276468.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/86819713368.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/dodijotowowakubupeda.pdfIn PDF document text
    • https://cubic.is/userfiles/file/74057081595.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/rezaduzejajavi.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/33223657154.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/fupoxoxa.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/87279767733.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/vazunemamoko.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/dapogewadenebizofalefe.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210907211625.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/zifatasitetupafarizel.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_off0000bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 16896 bytes
SHA-256: 50fde31ea79b103485ddc01e4d85a8d1157ab1468c2bd7b49bfb6fc9f9561e1a
font_01_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 10816 bytes
SHA-256: 57d38ae6b39822e6c1a643c16bfb1577a9860a67721e679e0e9ddda8bcfbcadf

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