Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d27c26cf0aee2d…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 03:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 173adbc3375c7599d8b5964578749455 SHA-1: 364e5eadaa67ae200f929dd71b29178c156d9951 SHA-256: 90d27c26cf0aee2ddfea6d4a8a3e99e8af1ba072e1a167eac17bfdbe0dd1d661
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure using an image to redirect users to an external URL. The embedded URL `https://jacksth.ru/123?utm_term=what+is+the+average+salary+of+an+operations+manager` is presented as a search result, suggesting a social engineering tactic to trick the user into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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://jacksth.ru/123?utm_term=what+is+the+average+salary+of+an+operations+manager PDF link annotation
    • https://cdn.sqhk.co/lemisobe/7iidEZT/zujejejodobox.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/ia8Ygvu/minecraft_2ds_xl_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/ggsq2wg/vujufojopinusuzi.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/igdgc4N/70_s_rock_music_greatest_hits.pdfIn PDF document text
    • http://sdek-24.cc/josalajulukunisisu3fl.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/86069469023.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/viajihi/duzokowuritupalamigutuviw.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/L40Qig8/uefa_champions_league_2019_live_scores.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/video_games_lana_del_rey_piano_chords.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/wexukufedepim/brawl_stars_free_pc_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/17427483668.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/82477780812.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/33259723313.pdfIn PDF document text
    • http://likebisuwuselo.rf.gd/tavifurekabaperasov.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/ieee_latex_template_conference.pdfIn PDF document text
    • http://bitines.myartsonline.com/introduction_to_computers_worksheet_1_answers.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_off0000e270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE270 5488 bytes
SHA-256: 92b6299f408603b4b6253057655b0bdde7bf9bfdb26347f678cbbeb6afb5d11c
font_01_sfnt_off0000f510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF510 11128 bytes
SHA-256: e0c09b9cbf0cbd04be7c4d9a32a53432c9993595d91fb2f2467d87638eeb436c

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