Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d9e787bd47e7c0…

MALICIOUS

PDF

63.9 KB Created: 2021-01-24 04:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef980d6a25e71b6debeb31347bb70916 SHA-1: b55daeada177ac9169d1e44481e92a408c2c2936 SHA-256: 32d9e787bd47e7c06ed71178bb28f967836c5be1043c7828ebd02c607349dde2
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of a visual download button and multiple embedded URLs suggests a phishing or social engineering attempt to trick the user into downloading a secondary payload. The document body contains corrupted text, but the metadata indicates it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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/aws?utm_term=adure+gilila+song+free
    • https://cdn.sqhk.co/fimirexuf/ejhghjS/lafibob.pdf
    • https://site-1177462.mozfiles.com/files/1177462/assistive_touch_iphone_x.pdf
    • https://cdn.sqhk.co/duzixulok/eRgingd/walking_dead_zombie_mask.pdf
    • http://naguvogegexaze.22web.org/benomililipufejifo.pdf
    • https://cdn.sqhk.co/tajalawad/ejjhgj2/lucky_block_mod_download_minecraft_pe.pdf
    • https://cdn.sqhk.co/nasanoroge/Ticjhhg/70910312623.pdf
    • https://static.s123-cdn-static.com/uploads/4476437/normal_5fdcd8599acdb.pdf
    • https://cdn.sqhk.co/wubunepan/heijigb/hello_talk_chat_meet.pdf
    • http://toselarasomax.iblogger.org/hubspot_inbound_marketing_answers_2019.pdf
    • https://site-1177467.mozfiles.com/files/1177467/luwasijoliwisawipefifiw.pdf
    • https://cdn.sqhk.co/jutigurotow/9gjOzgj/jemipaxinuvanex.pdf
    • https://site-1178429.mozfiles.com/files/1178429/fagijuki.pdf
    • https://site-1178275.mozfiles.com/files/1178275/barcode_scanner_application_free_download.pdf
    • https://cdn.sqhk.co/bitenutugiw/ghgjibx/english_language_learning_app_free_download.pdf
    • https://site-1178817.mozfiles.com/files/1178817/numusarud.pdf
    • https://cdn.sqhk.co/puvegipuros/iFhfgi6/atlanta_weather_mid_september.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0bd.bin
25dd921b491378dd6e42aa2d4fbc117857c31cab4d02949e872284b5fce88068
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 5064 bytes
font_01_sfnt_off0000d205.bin
0f487ba07a5cd4fcac184b8a192bb4e0134463243c1db0e323223e5b2f39aede
pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 9504 bytes