Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0344ae2a580aa4e…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 10:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8636d4b2e174cd524e401c0061e100e5 SHA-1: a4167a2d826fa5f45bf55b5a0ecb6c3c25f94800 SHA-256: b0344ae2a580aa4e7609e0a9b30649fed73908d84b26bad4dae51a1a7d5d3300
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'unblocked games', suggesting a lure to attract users to the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/wix?keyword=unblocked+games+77+earn+to+die+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366984/normal_6038ca2bb13cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/thbjjZN/34446039934.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/hjeif8T/my_airtel_tv_channel_list.pdfIn PDF document text
    • http://ital-girl.space/how_to_make_a_cracked_minecraft_server_for_freetbmzc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_5fd823b344a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_5fdacc6298863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_60296fa93badc.pdfIn PDF document text
    • http://profer-opt.ru/pulevmcxz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462681/normal_5ff021a4b0ab5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_602efbe14b9dd.pdfIn PDF document text
    • http://senteber.site/juvajujogafivu46fk4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_6002378c51f5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_6033a640300fc.pdfIn PDF document text
    • http://helpverifybadges.com/daxusazqrew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5fdd646fce408.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/viromibukoleliw/your_foster_parents_are_dead_meme_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c197a4c-d523-4d38-ad06-18562ff327cb/8610728462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac728147-4b24-445b-aba2-1d4accaf96dd/88819500329.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/how_hard_is_physics_1_ap_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724fa4e7-19f8-4b85-90f1-dad63649d3ca/43606314992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5240c091-c7de-4566-97db-674641e54a7f/pativudu.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/lux_guide_s9_mid.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/wisaruwenadazojemaz.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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 5700 bytes
SHA-256: bd7134d05ba470dd59d26e4dd86e52134ed750d34742eddc81e5e4e6e1a6b707
font_01_sfnt_off00010c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 11076 bytes
SHA-256: 59ba45cf351cc353fa5748f4ef9ec10d0b93ea3445edcb4e4b676112f14d9438

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