Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9f015ee6971fcc…

MALICIOUS

PDF

74.3 KB Created: 2021-02-27 21:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b102ca8a5d2c9afaf5dbe33eadbbef8e SHA-1: ad84b5176f078a4960d0706424f30c3a362db144 SHA-256: eb9f015ee6971fccb8fda1f2171ff6fe7f8ede5257372ad135342ab5d632a0c6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a phishing lure related to a common technical issue. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/award?keyword=why+did+my+vizio+soundbar+stop+working PDF link annotation
    • https://cdn.sqhk.co/wodelaganav/igwgfjc/faraway_tropic_escape_level_4_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/1dDzjal/wemoji_whatsapp_sticker_maker_pro_apk.pdfIn PDF document text
    • https://ruwiwiteviporiz.weebly.com/uploads/1/3/4/7/134767377/bb6d4bdab6572.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/67465006773.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/77006991989.pdfIn PDF document text
    • https://cdn.sqhk.co/kufejagefep/dS7Dyih/oldies_music_70s_80s_90s.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/how_to_make_money_in_stocks_with_little_money.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/hcdu556/magic_dream_tiles_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/Cgjbgc5/game_airplane_fly_hawaii_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/27510849324.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/vk_er_chrome_extension.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/gugowalot.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/la_chevaleresque_piano_sheet_music.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5864 bytes
SHA-256: ec66b2dcdb308c62768a31b4dcc190a4d6d59439c649d3717dbd9fd7674ecad2
font_01_sfnt_off0000f84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84D 10480 bytes
SHA-256: 4f1d89ac4d60b90d85d20cd1003722eeed247d40bccd9eb756102f6f80dc402c

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