Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93e076fc92e207c…

MALICIOUS

PDF

86.0 KB Created: 2021-02-17 05:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0392ab437088a4ba24485ca91c60c9d SHA-1: cefd3e489fe9f3732740b1ceae076950bb352d19 SHA-256: a93e076fc92e207cdf5554e1acf12cd200d2541e75547030eb3422c39da7207c
136 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. Heuristics indicate it contains an external URI and an image lure linking to an SEO redirector, specifically 'https://seumenha.ru/wix?keyword=tera+glyph+guide', which is a common phishing tactic. The PDF structure and embedded URLs suggest it is designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://seumenha.ru/wix?keyword=tera+glyph+guide PDF link annotation
    • https://cdn.sqhk.co/jakufomego/DvjbhbM/third_person_shooter_games_for_mac.pdfIn PDF document text
    • http://fbdirect.site/xuvetofosajumakutuvuzopyg0kl.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/rmhdiag/fijufowaxapawetukuwi.pdfIn PDF document text
    • http://betmoy56.com/dictators_no_peace_cheats_pcigs1k.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/hc4hehh/real_car_racing_games_play_online.pdfIn PDF document text
    • http://kostlike.site/cafe_racer_seat_pan_for_sale4y9cm.pdfIn PDF document text
    • http://slamelina.website/lim_please_input_answerupcg9.pdfIn PDF document text
    • http://beliyden.xyz/johanna_gomez_reporterernmt.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/tjiWjij/96970166552.pdfIn PDF document text
    • http://belplitka.ru/calendar_template_2019_uki0dtz.pdfIn PDF document text
    • http://udilische.club/instagram_chat_online_on_laptopgdokg.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/muxegeza/dasugumebife.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/wenididalalumebusowor.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/employee_timesheet_web_application.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/75374994071.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/89999784155.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/voluntary_acknowledgement_of_paternity_form_pennsylvania.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/27229459066.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/78045156913.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/20400211843.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/aleks_combustion_analysis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/iphone_7_camera_app.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_off00011436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11436 5096 bytes
SHA-256: e179f11ba55510fabe733c99d3960b2b7aa1b75142af1edf015b27deef24fb32
font_01_sfnt_off0001258a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258A 10760 bytes
SHA-256: 7aa8dbf5bbe3d5d70eaed3a251d05fe6ceb0ba34b0d6d419d746ded31326bd15

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