Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50f446d6aef109f…

MALICIOUS

PDF

73.3 KB Created: 2021-03-02 23:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8e268e60d0887bff7c69501de68909a SHA-1: 5d8d456939b692703cb5c2dab6ab84f4c63bf3a4 SHA-256: b50f446d6aef109fa0a72b87ac695acec5b6ccff262edf3bb2c42cebd3bbf49c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=toque+de+bandera+mexicano+letra+completa PDF link annotation
    • http://kafofal.mygamesonline.org/how_much_money_is_marla_maples_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/hfjb1N0/xoxasawimutepajewimoneje.pdfIn PDF document text
    • http://dompodklyuch.com/minecraft_pocket_edition_mod_apk_unlgx7ho.pdfIn PDF document text
    • http://jejasuresefuru.22web.org/hamilton_beach_flexbrew_reviews_49974.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ihmBLhe/download_rally_racing_evo_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/PTogcfW/virtual_table_tennis_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pibilebomek/fodhbgg/34460652761.pdfIn PDF document text
    • http://instofficial.online/math_coloring_worksheets_5th_grade_multiplicationrd7cp.pdfIn PDF document text
    • http://hookup673.site/zobebixovikatarigslkdx.pdfIn PDF document text
    • https://cdn.sqhk.co/vekunego/iibHCbe/street_racing_3d_mod_apk_unlock_all_cars.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://keluwuvofaj.epizy.com/9660430135.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/92219527939.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/tusatozatonubatorefagato.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/19818644124.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/kapijowe.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/xagamaxaxu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A5 5204 bytes
SHA-256: 37f507b57c0f411fdab7562a99ff5b337544b106dd3b9341e6757b2e29c68d08
font_01_sfnt_off0000e238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE238 11584 bytes
SHA-256: df60c0639c858aea4144921fbd965de4db037e5af3e9271e62f1be094785dc11
font_02_sfnt_off000107d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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