Malicious PDF — malware analysis report

Static analysis result for SHA-256 346eb58cbcc1bf62…

MALICIOUS

PDF

75.6 KB Created: 2021-01-31 22:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c08c2057b21651bebf1fe2f67c60756e SHA-1: 0d31aafd612be8a74d70a1a63bf2c4053980267a SHA-256: 346eb58cbcc1bf62e96e5fa35b10c01ae10df54be0d9b04d99257fca7eb96c8b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Mark-of-the-Web Bypass

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains multiple external URIs, including one pointing to a torrent download for 'resident evil 2 remake', and a heuristic firing indicates instructions to disable security software. The presence of numerous links on disposable hosting further supports a malicious intent to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • 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://bologen.ru/123?utm_term=resident+evil+2+remake+torrent PDF link annotation
    • https://cdn.sqhk.co/xenivoronizu/hohiLt4/dining_table_set_up_pictures.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/gta_san_andreas_trkiye_modu_tam_indirgj7hn.pdfIn PDF document text
    • http://tufezoba.22web.org/18242756924.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/cee59e861b985.pdfIn PDF document text
    • https://furivupes.weebly.com/uploads/1/3/5/2/135295821/8315802.pdfIn PDF document text
    • http://albl.ru/ice_crush_2020_apknzdxe.pdfIn PDF document text
    • http://geekcods.com/context_clues_exercises_with_answersyi3u4.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/5J9X1SL/76774650019.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/lejanumizavi_lulusax_lilikoj.pdfIn PDF document text
    • http://copyright-infringement.business/crash_fever_reroll_guide_androidkacib.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/cibXjfL/naver_papago_ai_translator.pdfIn PDF document text
    • http://sifamukuji.iblogger.org/lol_team_tactics_item_guide.pdfIn PDF document text
    • http://vbruti.site/devevefenarovugosozgurc.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/jbDohi0/coin_kingdom_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pevivudawof.epizy.com/bhootnath_return_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/anemia_hemolitik_adalah.pdfIn PDF document text
    • http://ruxofepugoloma.rf.gd/multiplying_monomials_and_polynomials.pdfIn PDF document text
    • http://zitosorav.rf.gd/cardiology_handbook.pdfIn PDF document text
    • http://jikokajogov.rf.gd/template_lnk2019_unresolved_external_symbol.pdfIn PDF document text
    • http://rajuleneto.epizy.com/gazinirakuxawuro.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_off0000e8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AF 5232 bytes
SHA-256: 52b378665313875234c2ec23711e6278a119d9b23b94271af56e0ed567dbb50b
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 11300 bytes
SHA-256: 47eff03231a9a0d5da712cab202d51426a31e142664a738748990ff96fc576d3

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