Malicious PDF — malware analysis report

Static analysis result for SHA-256 227297fcdd50c68c…

MALICIOUS

PDF

87.9 KB Created: 2021-01-19 04:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d626379f860c962a0f06884944df7316 SHA-1: d595dc87cf0b76c0643a302338102ae6bf663cfe SHA-256: 227297fcdd50c68cf598c90d64ad090ae58c13ae9e4f7de9c245ec09cd7e85c0
162 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by a ML classifier and ClamAV. It contains a critical heuristic firing for a PDF redirector link pointing to 'https://ggtraff.ru/aws?utm_term=3ds+max+2014+trial+version+free', suggesting an attempt to lead the user to a malicious download or phishing site. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/aws?utm_term=3ds+max+2014+trial+version+free
    • https://cdn.sqhk.co/fuwunikuneg/dieLKhd/hp_smart_printer_change_ink.pdf
    • https://cdn.sqhk.co/baxorurifina/eqhjghz/choices_stories_you_play_cheat.pdf
    • https://cdn.sqhk.co/zefinotobi/Vlii2Gl/67913356496.pdf
    • https://site-1176079.mozfiles.com/files/1176079/download_hit_knife_mod_apk.pdf
    • https://site-1248494.mozfiles.com/files/1248494/30131952851.pdf
    • https://site-1231003.mozfiles.com/files/1231003/85738596653.pdf
    • https://site-1260008.mozfiles.com/files/1260008/luxutalukarinuxa.pdf
    • https://site-1177219.mozfiles.com/files/1177219/80518332020.pdf
    • https://site-1166710.mozfiles.com/files/1166710/sozopixexuf.pdf
    • https://cdn.sqhk.co/joxomawezu/ZnnChGt/the_legacy_apartments_tampa_fl_33603.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ritarejameja.epizy.com/south_african_hypertension_guidelines.pdf
    • https://s3.amazonaws.com/dudujopixejikug/91241896913.pdf
    • https://s3.amazonaws.com/vebogotexaf/votegevijekudewusupufanoz.pdf
    • http://litufowanukoro.epizy.com/avira_vpn_pro.pdf
    • http://vemesivudaro.epizy.com/xaniwuveriwejipisikot.pdf
    • https://s3.amazonaws.com/jeromopelurab/46116045540.pdf
    • https://s3.amazonaws.com/befarekogol/5803215113.pdf
    • http://kesobikifa.epizy.com/aacomas_transcript_matching_form.pdf
    • http://tipunogat.rf.gd/85476345300.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106bc.bin
6dbc23eda06b037a352a84ddd0cabc7fdd653bb116ab9583b4800f46794a4765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 3876 bytes
font_01_sfnt_off000114b0.bin
680c73d0de6bb7151d043e456098c08355b350448eabfc5045eefb440018250f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B0 5664 bytes
font_02_sfnt_off000127ef.bin
03a80b2b12f68174d28384bdd27c9cbf37fc544771fb8679dfa15a9910310661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127EF 12724 bytes

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