Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a0462f0ca4f765…

MALICIOUS

PDF

80.3 KB Created: 2021-02-16 23:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dded308ebcbc273d6c97dbd2806e4efb SHA-1: a7ac74bfcdbd8a9be962275f8d457353e4dc0456 SHA-256: e6a0462f0ca4f765caff5c2d3d30aa95216edfcbab2721fe096f780e7a9eacd1
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'parts of speech worksheets', which is likely a pretext to drive the user to the malicious URL for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=parts+of+speech+worksheets PDF link annotation
    • http://bionatur.space/drivers_ed_permit_test_answers_floridacwdn4.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/0AIihby/hotels_near_chattanooga_tn_convention_center.pdfIn PDF document text
    • http://dommasters.site/45597799615zm7ff.pdfIn PDF document text
    • http://hydra.moscow/51031441857zdg6y.pdfIn PDF document text
    • http://ital-girl.space/best_vpn_for_pubg_mobile_liteqteo5.pdfIn PDF document text
    • http://dommasters.site/moodle_complete_tutorialg4zkk.pdfIn PDF document text
    • http://opticsystem.website/divinity_original_sin_enhanced_edition_guider79bx.pdfIn PDF document text
    • http://psychologyrelax.xyz/xavuruv3x3hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://labazesunug.epizy.com/kavusiliku.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/nopajitisenil.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/51442479507.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/business_income_expenditure_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/high_resolution_bollywood_music_sites.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 4860 bytes
SHA-256: b5186df7c39d42d6c177acd39d076da26155d591fa21b54daae042acfdd396e8
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10556 bytes
SHA-256: dce4f09f5bfb62dfcd623f862d98166b92a3038eadfd90abcb1308563aed9c94
font_02_sfnt_off0001262e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333