Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccac4011c249337d…

MALICIOUS

PDF

98.8 KB Created: 2021-01-22 11:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c39314b8524fc88aeb6db345df507d53 SHA-1: 97568204be4724c7444247457af9e972eba5128c SHA-256: ccac4011c249337dd7f5602ccf02baac639211989cefca71334eff90512e28c2
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to disposable hosting and link farms, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/123?utm_term=steelers+vs+patriots+super+bowl+history PDF link annotation
    • https://cdn.sqhk.co/vagekoxes/zhg5Xih/safari_browser_for_windows_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/hehdieY/comic_reader_app_ios.pdfIn PDF document text
    • https://site-1243583.mozfiles.com/files/1243583/vividevidu.pdfIn PDF document text
    • https://site-1168211.mozfiles.com/files/1168211/kirogakujozizefinonur.pdfIn PDF document text
    • https://site-1168006.mozfiles.com/files/1168006/vitamin_d3_benefits_hair_growth.pdfIn PDF document text
    • https://site-1178814.mozfiles.com/files/1178814/dragon_wallpaper_for_desktop_pc.pdfIn PDF document text
    • https://site-1174133.mozfiles.com/files/1174133/gaxegenewudadazazovidason.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422620/normal_5fd7b425108a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482618/normal_5fe54355ee00a.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/EIhghgt/radio_italia_gratis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fffea1a5f645.pdfIn PDF document text
    • https://site-1176876.mozfiles.com/files/1176876/suvafoxubedides.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487897/normal_5fcb2c123dc90.pdfIn PDF document text
    • https://site-1178256.mozfiles.com/files/1178256/40013025364.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/hfifvhg/flights_to_miami_from_chicago_midway.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/sakaburepagase/reporting_accident_to_insurance_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/after_effects_project_files_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/burning_bright_movie_in_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/mazikuro.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/twice_fancy_you_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/app_lock_free_latest_version.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_off00014551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14551 5404 bytes
SHA-256: a452847c2fefd0d3a0ddb3c21eb3d31a8743c49488620a927732b33589ff284b
font_01_sfnt_off000157b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157B9 11416 bytes
SHA-256: cdccafe6a39ce0042a4cb0b258b5ff5071214aa26f8e719b214ec6152d3d1488

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