Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46d21543baceb3d…

MALICIOUS

PDF

76.0 KB Created: 2021-03-13 20:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b2e43fbbe4bc7581ae197f5e32017995 SHA-1: 74d2b131d6144ad8264febbbeb324e208571438a SHA-256: d46d21543baceb3dd8b7029fbb2993b7b8c68d976634de5cfd8872c27c40c89f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, appears to reference product keywords, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=inova+9+quad+core+tablet+pc PDF link annotation
    • https://cdn.sqhk.co/moserusoba/GhiuIjg/vamoga.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/fetncpV/merchants_auto_insurance_claims.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/1ibhghj/all_in_one_social_media_app_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5fe57fb08019a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6016369bdbe3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_5fdb061940fde.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/dihidhh/pounds_to_dollars_conversion_on_specific_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vopokemib/jWwJVBM/76089813677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_602fe5cb0cd2f.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/gjcEVhb/bugelufakuralamib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_60325bd824dec.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/hj8jcNa/wivijisiwivose.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/jmhghhZ/xowatomiva.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/djeiaia/rupokavitiwifapomet.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/ic8WRha/sapipowinatepulezigumexo.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/6NOaG1P/sniper_rifles_used_by_us_military.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/hbBKnH4/new_romance_of_the_three_kingdoms_hack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0efcfbca46.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/hgkjamJ/18871403376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fd9955283eb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizudojaxabite.epizy.com/2018_acura_tlx_elite_owners_manual.pdfIn PDF document text
    • http://varoxekoduv.epizy.com/3696749380.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_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 5308 bytes
SHA-256: 99298f4caa9cda7ac638c67edbd8f4ab729df63cd3c46a34dec5f43048029cc7
font_01_sfnt_off0000fcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 11192 bytes
SHA-256: 5ec7b078c3cfa5f242d623e96761b3b0772bf66db66c3ccf13fca6f3c0b45af3

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