Malicious PDF — malware analysis report

Static analysis result for SHA-256 5791ad5cd95afa01…

MALICIOUS

PDF

80.1 KB Created: 2021-04-04 14:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b86bb1cd82264448a981584a2629629 SHA-1: 68d1051f358d504086484fbc73f5ed58c636c297 SHA-256: 5791ad5cd95afa017ee5ec99ae6d99fbebc17a5cf5ee7eb9ba104c69be0336e7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a heuristic indicating a fake CAPTCHA or human verification prompt, designed to deceive users. It also embeds a URL pointing to a site offering 'free robux hack generator', a common lure for phishing or malware distribution. The ML classifier strongly flags this PDF as malicious, and ClamAV also detects it as a phishing trojan.

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://resalured.ru/wix?keyword=free+robux+hack+generator+2020+no+human+verification
    • https://cdn.sqhk.co/nananava/hbhaiaQ/98760268353.pdf
    • http://helpverifedbadges.com/botixihriam.pdf
    • https://static.s123-cdn-static.com/uploads/4408990/normal_5fdf8b80a8ffd.pdf
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/roweb.pdf
    • https://cdn.sqhk.co/bagadogod/yamJgi5/sukaligizoxojisawodad.pdf
    • https://fuzakeraza.weebly.com/uploads/1/3/4/8/134848422/996064.pdf
    • https://gizewafimeferem.weebly.com/uploads/1/3/4/5/134578419/3053007.pdf
    • https://cdn.sqhk.co/vewukiziwemi/Ndtiiic/57813072860.pdf
    • http://voirly.xyz/inkscape_for_mac_os_catalinamqf1b.pdf
    • https://cdn.sqhk.co/linewebozid/hhijhc6/power_kite_wind_speed_guide.pdf
    • https://cdn.sqhk.co/sunidoxil/QsjbKhi/19909611492.pdf
    • https://static.s123-cdn-static.com/uploads/4473890/normal_5ffb27c412d26.pdf
    • https://jobuvurivoko.weebly.com/uploads/1/3/2/6/132681743/316a7aeeb52c5.pdf
    • https://subisadorug.weebly.com/uploads/1/3/1/6/131637552/f32fb87f8.pdf
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/wazanupajibibi.pdf
    • https://cdn-cms.f-static.net/uploads/4426085/normal_601de7e92623e.pdf
    • http://sravniproxy.info/dictionary_of_demons_belangerpa03m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3e64fca4-97a2-48e1-bd91-92c9b980d1ff/sijasexibuvuvoxolujoki.pdf
    • https://uploads.strikinglycdn.com/files/23185261-222e-4ffb-95ce-bee74531a0f4/how_to_exercise_with_bands_for_strength.pdf
    • https://uploads.strikinglycdn.com/files/2fb24e5e-3b06-4a38-909b-cba15690ab2c/diloba.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_off0000eae9.bin
67830bde7bbcb007143d4cad9d78ed646d59a23a30c41485c8df554cc078b8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5528 bytes
font_01_sfnt_off0000fd9d.bin
f96bf346accf5ceaebdabe4199c2347ca80af8517800359e0911c010942a52e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9D 11532 bytes
font_02_sfnt_off000124e0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E0 4324 bytes

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