Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bddde2f55261c7d…

MALICIOUS

PDF

73.8 KB Created: 2021-03-16 04:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0499268115cd5ed12e6a7cc049563ff0 SHA-1: b262faf0dc6ebe674f5a07874a2a83dfc2e8c8fe SHA-256: 5bddde2f55261c7d2f2d15c9e2772b2bc5a93997883217909cd82dfab2da34ac
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious phishing content. It contains an embedded URL that redirects to a suspicious domain, likely serving as a lure for users seeking information on common tasks. The presence of external URIs and the ML classification strongly suggest a phishing attempt designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/strik?utm_term=how+to+replace+a+washing+machine+drum+bearing PDF link annotation
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/pikovigaputud.pdfIn PDF document text
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/c368a4cd.pdfIn PDF document text
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/8454205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492871/normal_600c978fd6f46.pdfIn PDF document text
    • http://ital-girl.space/victorinox_inox_watch_bandjvgeo.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/92517324938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_60119756c80a3.pdfIn PDF document text
    • https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/7281380.pdfIn PDF document text
    • http://leree4.club/janitrol_heater_manualxmbo0.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/8_quart_power_pressure_cooker_xl_accessories.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5fdfdeccca0ad.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/7831534.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/zolerazowubow/the_man_in_the_high_castle_season_3_episode_2_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/report_lost_driver_license_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/90467554399.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/pay_it_forward_movie_free.pdfIn PDF document text
    • http://sowutafamewuben.rf.gd/lixuvomapamalelo.pdfIn PDF document text
    • http://bofiragomux.rf.gd/sql_formatter_for_sublime_text.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_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 5680 bytes
SHA-256: 2b9fb4a9d90d3f2d679f473eb08534a55fa82e15ba244190c9bcaa41813ea5ba
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 10796 bytes
SHA-256: 0404170734b567eb151fd68e1d42d29f3ff04da15a1ddbab858f11c3369cc1a4

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