Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29a04fa983ff6ff…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 11:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 102f33b2f94f953a864507fba379b2ba SHA-1: 5f3fa3d72aafb5223f4d2bc630f696e7a9e3dff0 SHA-256: e29a04fa983ff6ff745587effdeaf243d6b794c335a27a3c07ff6c16bb1562b8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and a high ML classifier score, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to malicious sites. The presence of embedded JavaScript points to an attempt to execute code, likely for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pixomot.ru/uplcv?utm_term=free+space+on+android PDF link annotation
    • https://mlbcsimleague.com/ckfinder/userfiles/files/3167967067.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/33583610323.pdfIn PDF document text
    • http://isgsrl.it/images/file/87493707789.pdfIn PDF document text
    • https://computerzone.pk/file/zogesetiwofagulajugo.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/78166387034.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/30502610138.pdfIn PDF document text
    • http://protok.pro/upload/files/zaxanolokifizoba.pdfIn PDF document text
    • http://vbond.hk/editor_upload/file/pamubuwo.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/fibux.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/44250906316.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/oegfs1mr4v662h31v7pn1u0k7f/44104266550.pdfIn PDF document text
    • https://profesa.net/userFilesfile/jesefug.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/petumunenavax.pdfIn PDF document text
    • http://suurelepa.ee/data/file/61053991281.pdfIn PDF document text
    • http://nfc.soo.jp/file/jizutatuwefonaxitolunedo.pdfIn PDF document text
    • http://fohow77.ru/upload/file/pipadi.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/fukibik.pdfIn PDF document text
    • http://oodow.cn/upload/file/210925171336920473yt70yneggku3.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/73880044669.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_off0000aa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A9 10340 bytes
SHA-256: 17beafa7aa7c18a1767b56a430041b874bf002d9f892e5e735d2b013e0968681
font_02_sfnt_off0000da11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA11 17840 bytes
SHA-256: 29edcc696be25ca9adfe4e66a43ae042d1e984815953294bc18cf78bb3f04cf5

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