Malicious PDF — malware analysis report

Static analysis result for SHA-256 d502ec85598e1fed…

MALICIOUS

PDF

77.8 KB Created: 2021-03-03 19:13:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c37d274e2b1f21a66f38d37218cf680f SHA-1: e11650178be8de06636484fc889ea8afcf3ead91 SHA-256: d502ec85598e1fed45aee86fea69c37b3a76bcf1e5179e74f74c67b0ecd0c833
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which is flagged as malicious and leads to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Present perfect exercises', likely to trick users into visiting the malicious URL.

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://ponafet.ru/123?utm_term=present+perfect+exercises+multiple+choice
    • http://delaem-sami.online/34812055835q7dq8.pdf
    • http://helpverifybadges.com/nikorabibimelixi2cxc9.pdf
    • https://cdn.sqhk.co/nupegefozub/TvIZLc3/pandemic_legacy_season_2_companion.pdf
    • https://cdn.sqhk.co/pexudolifa/giXophg/47925892852.pdf
    • https://cdn.sqhk.co/mewowoji/Ghepa6f/miloru.pdf
    • https://cdn.sqhk.co/wiwuwigo/gigjTFW/tumizesilu.pdf
    • http://mkr-olimp.info/lefugebuwuvonododizufo9afaj.pdf
    • https://cdn.sqhk.co/naliwanik/qhh5jc6/the_rolling_snowball_2_3.pdf
    • https://cdn.sqhk.co/fisoxinizo/ia7ZjbH/pounds_to_dollars_conversion_today.pdf
    • http://dabipijejunale.22web.org/povoxibemubemusidogowejof.pdf
    • https://cdn.sqhk.co/kavesake/Npidkhf/v-_moda_crossfade_ii_wireless_review.pdf
    • http://tesar-krd.ru/the_end_hot_sauce_scovillepj8rn.pdf
    • http://homebig.space/aluminum_extrusions_for_polycarbonate_sheetsed0m1.pdf
    • http://copriyghtconfirmed.com/sri_lakshmi_stotram_in_teluguysh3x.pdf
    • http://yachts-4-sale.com/total_war_warhammer_chaos_corruptionor4qx.pdf
    • http://fumigatoff.online/bodixeyawdp.pdf
    • http://elinekici.online/mercury_force_120_manual7hej6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gebejofokim.rf.gd/xejifavewakenafaperiro.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54d.bin
866a8fd80b1c10474b03800e70aec1188c9073e98b23224e2358846b089dcaf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 4996 bytes
font_01_sfnt_off0000f61a.bin
370d460328105b14ed8d42ee566ce12938880256b9a403a4f5cda081ec16a2eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 11580 bytes
font_02_sfnt_off00011be0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 4324 bytes