Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fa3a50eac46212…

MALICIOUS

PDF

74.1 KB Created: 2021-03-17 15:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d10c1566ac874250ef7b5dcb9b65eee1 SHA-1: 0d0caa07527a5e389fc3143a33c0e53bd5d52b46 SHA-256: 59fa3a50eac462126c734411076a013728bd1400718ce1809df525ba3715f53b
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation and a title that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/wix?keyword=3+conflicts+in+the+most+dangerous+game PDF link annotation
    • https://cdn.sqhk.co/veletafi/thjiepi/rummikub_game_near_me.pdfIn PDF document text
    • http://claire-irk.ru/how_to_sell_real_estate_leadspdnfv.pdfIn PDF document text
    • http://worldhold.online/20113231744cofqi.pdfIn PDF document text
    • http://whalesqpa.fun/mrs_funnybones_bookt4dtz.pdfIn PDF document text
    • http://smeh-mif.space/security_deposit_receipt_template_wordgbvix.pdfIn PDF document text
    • http://kelnoteres.xyz/sivaziradebowunewu1zwkk.pdfIn PDF document text
    • http://vittorguxx.site/how_to_draw_open_book_easy3fkny.pdfIn PDF document text
    • http://milesnires.xyz/xorubatowuvovutinex6vkhi.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/aiddD1Z/pirates_dice_game_pirates_caribbean.pdfIn PDF document text
    • http://armada.technology/real_racing_3_traileruc0ol.pdfIn PDF document text
    • http://brandframeb.com/futur_proche_vs_futur_simpletkyke.pdfIn PDF document text
    • http://differencecheats.net/sennheiser_rs_180_wireless_headphonesvm7g1.pdfIn PDF document text
    • http://bioforce-co.site/how_do_i_trade_forex_with_100iebdl.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/hihiMjf/lizisov.pdfIn PDF document text
    • http://scm03.ru/gba_emulator_iphone_11_13._3._10j0j1.pdfIn PDF document text
    • http://reduslim-eu.site/piwigop5dpo.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/C4RkGgc/doponabiretiposasisodok.pdfIn PDF document text
    • http://normal-id.com/5_love_languages_for_child_quizryl1b.pdfIn PDF document text
    • http://flylovel.com/49342239160i1hw1.pdfIn PDF document text
    • https://cdn.sqhk.co/mojafefegamo/DkicUPT/pumixiligix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabopegimunufet.rf.gd/95674867851.pdfIn PDF document text
    • http://gikunipif.epizy.com/wetijesumipemujoxokupudi.pdfIn PDF document text
    • http://wewilikenu.rf.gd/barcode_font_not_showing_in.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_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 5504 bytes
SHA-256: bf85a198cf3a2c486013c6eb698390037f3ef54f747e589ab6bc6064c958e93a
font_01_sfnt_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 11268 bytes
SHA-256: 5ae26f063218c2f9a8a7b8508cbfc836a7643e75a74125ce6d424678324f1262

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