Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8dd9c6a6e4b8c2…

MALICIOUS

PDF

81.0 KB Created: 2021-09-09 05:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0b8914268b8ea00dd7bb4ff2e532c2e SHA-1: 04bba934dfaeb59912c279b8dff5578038291a0f SHA-256: 9e8dd9c6a6e4b8c2f903c248bfea2e478572e0425563221f68cddb52f3cd597b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to download sites. One notable URL includes the term 'download jumpstart wifi hacker for windows 10', indicating a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://futurefacesmiami.com/uploads/file/84815547871.pdf In PDF document text
    • https://bczenekar.hu/files/file/24674811307.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/tumirajivodorizoj.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/74432756652.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/6959488173.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/86293697944.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/85649666618.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/nobegurik.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/34825734253.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613735efa89e5---bulum.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/filofitikalukubokobuziz.pdfIn PDF document text
    • http://charivne.info/images/file/50421122279.pdfIn PDF document text
    • https://km2804.com/ckupload/files/21155059293.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/sekij.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/jatapovipajutedakalovez.pdfIn PDF document text
    • http://hydrem.ru/images/file/78119743318.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/79406435333.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/vasid.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/kelawifo.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/gividosutopavunal.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/nikopazolo.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/68584874702.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/xojakogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+jumpstart+wifi+hacker+for+windows+10PDF 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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 16912 bytes
SHA-256: 36cda18a789307c926935ca08172b4e25932c612690e82171f0d205bd4edb7ff
font_01_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 11468 bytes
SHA-256: de14ae8ce711d50234b6dcbd3b88d83837b6486d6b2bc09c80f4bcf90a3d5612
font_02_sfnt_off00011e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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