Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce37f1c0cb9adf74…

MALICIOUS

PDF

70.8 KB Created: 2021-03-22 15:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5da81f774817e8771055ad6171fb6f91 SHA-1: d53c1e3068c109486eda7ed8cd1e9783ea72daea SHA-256: ce37f1c0cb9adf744ff78f185d2f31390ad07a1516adcb498a4b4c5e767dfaad
166 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that appears to be a lure for downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to obtain a password for an archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/award?keyword=beatles+revolution+tab+pdf PDF link annotation
    • https://cdn.sqhk.co/pulafefer/PnrqKjf/tesug.pdfIn PDF document text
    • https://vukedezesul.weebly.com/uploads/1/3/0/7/130776134/696889.pdfIn PDF document text
    • http://gididowofugu.iblogger.org/37138192795.pdfIn PDF document text
    • http://giveaway2020.info/kenwood_ddx418_priceufkkv.pdfIn PDF document text
    • https://cdn.sqhk.co/tezasevimab/Mjhiaii/album_songs_free_isaimini.pdfIn PDF document text
    • http://sneakerspapa.store/2010_camaro_ss_6.2_top_speedfnav2.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/podufesikexafedur.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/9500706.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/jurnal_tentang_agama_islam.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/3kgcbih/the_light_between_oceans_full_movie_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/ibgiChf/screen_recorder_without_watermark_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kekoseni/Gjcgf6X/82699902810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidazeze/what_is_service_oriented_architecture_and_web_services.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/kakaboromivozinefinetus.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/bruce_lee_telugu_movie_videos.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/sujet_brevet_anglais_2020.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/voziledupu.pdfIn PDF document text
    • http://kilobawul.rf.gd/36219174457.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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 5284 bytes
SHA-256: e2e9f223bd36d8175a82c2a810fe5c5c881282022c7089525b162ac7f37254a0
font_01_sfnt_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 11372 bytes
SHA-256: b6cf09086f9932c751d83128939a092a3af2ae3a74fcaf6b82eedcb345a5f713

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