Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3f1d5e8e9ee397…

MALICIOUS

PDF

65.1 KB Created: 2021-02-02 04:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8040fe7365960a3504f14b01c28c2052 SHA-1: 502589cb1b2c41ad71ae8864797a19d42c33a3ae SHA-256: 0e3f1d5e8e9ee397c501b2fb044b7c844029e21cf0967ca32f3fd00657d27b56
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, many pointing to disposable hosting, and the document body, though heavily obfuscated, appears to be a lure related to weather information. The presence of external links suggests an attempt to redirect the user to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=cheshire+ma+hourly+weather PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494435/normal_600fb28a12ab5.pdfIn PDF document text
    • http://luminar2-download.xyz/automotive_battery_size_chart6fcxk.pdfIn PDF document text
    • https://cdn.sqhk.co/powitaxixu/hgihjeQ/art_masterpieces_creative_sticker_mosaics.pdfIn PDF document text
    • http://kovezemunoropu.iblogger.org/75197949050.pdfIn PDF document text
    • http://wofeboz.66ghz.com/henri_lloyd_swim_shorts_size_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471083/normal_60055cf893a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_600f81ee4592c.pdfIn PDF document text
    • http://qrastenmap.online/22383126606mottk.pdfIn PDF document text
    • http://erethiztzj.space/586793119868eydt.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/kudefem/butchered_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/63558293330.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/best_wallpaper_ringtone_app_android.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/bisuwarimonolokajenu.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_off0000c241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC241 5024 bytes
SHA-256: 3f4ca6b16f6116892a57ef39171c846a0b9941d491907b9daeebcc620397c6b0
font_01_sfnt_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 10864 bytes
SHA-256: 62622403068a6d9ec2daba2b39ff06dd8df08c5c30b65e965043031b7d53565d

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