Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5812e97d402054…

MALICIOUS

PDF

76.5 KB Created: 2021-03-17 15:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cd337ef6f45fbce1c26d868ce8f0cc9d SHA-1: 1e1c10e21c56c7ead02c4ea88e25ef8b4497cdb0 SHA-256: 8e5812e97d4020542b575227d89f0d528112c8a38d0e9c4a5e667eddb572cb7c
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated, mentions 'Nervous system test review sheet answers', likely a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/wix?keyword=nervous+system+test+review+sheet+answers PDF link annotation
    • http://wusodopepufex.66ghz.com/fikanivamenedelorej.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/jgPuDHK/lunar_period_tracker_ovulation_calendar.pdfIn PDF document text
    • http://tamekawarol.66ghz.com/48648882933.pdfIn PDF document text
    • http://azorocheat6.xyz/62877529749eoyuh.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/AgcRjfV/monster_hunter_hunting_music_festival_orchestra_concert_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/ed6FgeH/fawixo.pdfIn PDF document text
    • https://cdn.sqhk.co/saboretiki/buhb9gi/tozugor.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/o0Djfka/23981683908.pdfIn PDF document text
    • https://cdn.sqhk.co/ranofakon/aMhghjg/strategy_synonym_business.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/wiegePn/archery_king_game_download_free.pdfIn PDF document text
    • http://dithetsen.xyz/foodsaver_v3460_not_vacuumingmzuxk.pdfIn PDF document text
    • http://puzezaxu.22web.org/70-743_passing_score.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/fgjLhiz/29073831751.pdfIn PDF document text
    • http://volosaty100.xyz/zijutusalaxekunuzebuxuw85r6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowuzifuw.epizy.com/66957218515.pdfIn PDF document text
    • http://famebod.epizy.com/60472528791.pdfIn PDF document text
    • http://zoxalojidud.epizy.com/full_marathi_aarti_sangrah.pdfIn PDF document text
    • http://xilibosukotijob.epizy.com/10503337368.pdfIn PDF document text
    • http://renemived.epizy.com/dizifa.pdfIn PDF document text
    • http://wogakuw.rf.gd/jopudukerot.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_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 5116 bytes
SHA-256: a1a9302f5369b423315e22f321dee5d47a8afecf525a8c9ece028bafac28623c
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10928 bytes
SHA-256: efeb46cb88b1042647865e266be55184c2d4a23dbbc3bec238a7e966c23ce8e0

Open this report in the interactive analyzer, or submit your own file for analysis.