Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5d4d5823db9a8e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-01 19:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18c97fe5ad5ce361ea349a6096053992 SHA-1: b7aba3ea81f1a7ed04d134db9d17b90b3b928172 SHA-256: bc5d4d5823db9a8ea3b5996fa65851a7c37f234c628369bbe9273e18586d7884
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to technical troubleshooting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=how+to+stop+rv+ac+from+freezing+up
    • https://mesitumavitolo.weebly.com/uploads/1/3/4/8/134866133/cf1ded035c4.pdf
    • http://wewogokuwidu.mywebcommunity.org/reliability_centered_maintenance_training_uk.pdf
    • http://constructionhouse.info/what_does_the_life_orientation_test_lot_measure6o279.pdf
    • http://fredo.run/2020_cadillac_srx_repair_manualwnejh.pdf
    • http://findattime.com/samsung_galaxy_grand_prime_plus_price_in_bangladesh_202078phg.pdf
    • https://cdn.sqhk.co/duxadikoti/gfjaRih/cataclysm_dark_days_ahead_undead_tileset.pdf
    • http://idealslim-italiaoficial.site/free_printable_goal_sheetsikzt8.pdf
    • http://opticsystem.website/slice_and_dice_data02jlh.pdf
    • http://sparzha.club/29047492582jmcal.pdf
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/fetexadobug_muwupale_mivokumoretox.pdf
    • http://cyberlife.store/how_to_tie_a_robe_sashm6h4a.pdf
    • http://idealicaitalia-official.site/what_is_blue_color_personalityejrhs.pdf
    • https://cdn.sqhk.co/xawobovuji/hcgi4c0/29212943659.pdf
    • http://shop-kid-toys.online/most_powerful_quotes_ever_spoken_in_hindiphjxc.pdf
    • https://cdn.sqhk.co/gidenateg/pnhcQRR/nintendo_switch_bluetooth_adapter_headphone_jack.pdf
    • http://remontvorot24.com/rezunapakibkdv1o.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e5.bin
1f606fc8a0e5983a8b0c05259f2247ec02a98cfe1b123fdf85c611be1c9a3ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5464 bytes
font_01_sfnt_off0001068e.bin
c6b1bb7af550799118ccfdd05e9f04c08df1df0ddb5938796580450e6fa066ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10724 bytes

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