Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead77ed81e5aabf3…

MALICIOUS

PDF

80.3 KB Created: 2021-05-01 08:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828f3e10d1aae85174dd7ee6f47e8e22 SHA-1: d453896f1ed084f5433c816a643387b59c437c0e SHA-256: ead77ed81e5aabf388f20d65d037c124dbba0504ceded0593c6874430a6d2abe
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a URL with a search query suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF_URI heuristic indicates that the document contains embedded links designed to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=myers+briggs+personality+test+letters+meaning
    • https://cdn.sqhk.co/tilamasepi/jeBhjib/air_bubble_sheet_buy_online.pdf
    • https://cdn.sqhk.co/zunezafi/vuBugdg/40263831050.pdf
    • https://cdn.sqhk.co/rosisole/jbUggmD/xixogoxaravimolagi.pdf
    • http://leaninrzpd.site/perception_in_artificial_intelligence_for_beginnersgeucf.pdf
    • https://cdn.sqhk.co/savunowudob/agcifgh/harvest_market_champaign_jobs.pdf
    • https://cdn.sqhk.co/mapuvokunoj/gbjehg8/effective_leadership_skills_training_ppt.pdf
    • http://dirupomavi.iblogger.org/27595188261.pdf
    • https://cdn.sqhk.co/vusutesilo/KNjfDjc/ping_pong_rules_around_the_net.pdf
    • https://cdn.sqhk.co/musezikuzapi/l7BidV4/smart_car_solo_performance_exhaust.pdf
    • https://cdn.sqhk.co/fegozanodedu/jfhilhW/920295406.pdf
    • https://cdn.sqhk.co/jakabapewuv/XHiGk0l/age_of_discovery_developments_in_geography.pdf
    • http://onkoprofi.ru/zinifuwukaludeog1b7.pdf
    • http://localdesign.me/the_spirit_of_the_laws_1748_summaryfkeq3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lapumugafo.rf.gd/52396153742.pdf
    • http://gijaguvid.rf.gd/70446234262.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/wufivusinuwuvozovo.pdf
    • http://folijurojavagig.epizy.com/rodijekamuk.pdf
    • https://s3.amazonaws.com/liluvad/xegomunajisugi.pdf
    • https://s3.amazonaws.com/pipaneku/apcrbc140_datasheet.pdf
    • https://s3.amazonaws.com/lerezazo/cheated_informal_crossword_clue.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_off0000ef5c.bin
c54e789474b8c2f5ef2b4d944c1fce35708c0340f9681d052fd62b4b0454e61d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 5172 bytes
font_01_sfnt_off000100dd.bin
2d96bb22385cc8604a9f4bcb62debce7fe9a0c3d51a0389de328a77d8bd560d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 10596 bytes
font_02_sfnt_off000124d1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x124D1 4324 bytes