Malicious PDF — malware analysis report

Static analysis result for SHA-256 db666d2c17c1c49b…

MALICIOUS

PDF

79.3 KB Created: 2021-03-31 02:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e18cb8dd97c6b300e6844f8f7aad9345 SHA-1: 455f1085a50a7766dfc28906c234401f83e2e892 SHA-256: db666d2c17c1c49b57d4de2adfa6aa56b7a430f079cfc4b31c73e0bfd84c20dd
116 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a phone number. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to trick the user into a fraudulent interaction, likely leading to further compromise or financial loss.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/wix?keyword=actron+cp9135+link+error
    • http://amst-watch-v2.club/the_sinner_horror_pc_game_downloadktcz2.pdf
    • https://cdn.sqhk.co/puviponapib/RjeerAH/15177521584.pdf
    • https://cdn.sqhk.co/kagaxavog/gpRibhe/legofesoro.pdf
    • https://cdn-cms.f-static.net/uploads/4493578/normal_60114c1bae222.pdf
    • http://kpupnov.pro/wapakapw7zrv.pdf
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5fe7cb25627ba.pdf
    • https://vepiniripalur.weebly.com/uploads/1/3/4/2/134235349/640500.pdf
    • https://madaleva.weebly.com/uploads/1/3/4/7/134772198/7717998.pdf
    • http://wellwork.site/scarlet_heart_ryeo_ep_8_eng_sub_free0ul9p.pdf
    • https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/e782e4931c1de.pdf
    • http://setifol.66ghz.com/17228861353.pdf
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6030358e3fe49.pdf
    • https://satemegozujig.weebly.com/uploads/1/3/4/4/134477909/zakigevenex_funufezofo.pdf
    • http://goodxday.xyz/is_dunkin_donuts_wake_up_wrap_healthyc4zq3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kegotetebam.epizy.com/halloween_hardest_word_search_answers.pdf
    • http://mexowotevofo.rf.gd/video_editor_software_free.pdf
    • http://pagitewuzowika.epizy.com/latest_amendment_bonus_act_1965.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_off0000e942.bin
29d132d5f45e6b2d976f24ff5a92345f77e298bb512a1d860a1e9d71acdb4878		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE942 4876 bytes
font_01_sfnt_off0000f9e5.bin
47bbc5e08983d5c2ff78933a2cecd21b32b635d5777a088a45a494eb67051bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E5 11348 bytes
font_02_sfnt_off000120b7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120B7 4324 bytes

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