Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecad73f638ecaad3…

MALICIOUS

PDF

70.1 KB Created: 2021-03-22 13:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a8a9cdedb2f2a2450bb44186283b0b5 SHA-1: b31f791d091962b7abdc96447d0f05f1c911da2c SHA-256: ecad73f638ecaad370b619203aa7f96a044737151909cb7a0781329933259be9
104 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a PDF_URI heuristic pointing to a suspicious URL, coupled with a 'SE_DOWNLOAD_BUTTON' heuristic, suggests a phishing or social engineering attack. The embedded URL likely leads to a page designed to trick the user into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=past+continuous+tense+worksheets+for+grade+3+pdf
    • https://cdn.sqhk.co/zasemewiti/Pibhbhg/1675416087.pdf
    • https://cdn-cms.f-static.net/uploads/4379732/normal_6032f129c2763.pdf
    • https://cdn.sqhk.co/neganobasiwe/g6ihiee/fortinet_firewall_300e_datasheet.pdf
    • http://merovew.xyz/tomamoyhmgl.pdf
    • http://kojazunupetip.mygamesonline.org/att_digital_answering_system_dect_6.0_manual.pdf
    • http://parralax.net/lamiwujifugajezujixefibertvuco.pdf
    • https://cdn.sqhk.co/vemetafije/JSgijid/juvijexuwirukovajopo.pdf
    • http://yandex-dostav.ru/boris_and_the_dark_survival_song_roblox_idvx7gg.pdf
    • http://goodnatural.space/juegos_educacion_fisica_para_nios7v38a.pdf
    • https://static.s123-cdn-static.com/uploads/4464861/normal_6004ec9dc97ed.pdf
    • https://cdn.sqhk.co/filomada/ijiVoed/traductor_de_espanol_a_idiomas_antiguos.pdf
    • https://cdn.sqhk.co/wadupaxi/jhhwicU/vosilove.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zalatikewal.atwebpages.com/states_of_matter_quiz.pdf
    • http://rixigor.onlinewebshop.net/wuronunixikikiguguso.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_2eabee381b334e0b88ed7aaa73b94ba7.pdf?index=true
    • http://rususekobijo.myartsonline.com/vunijawozutiwiva.pdf
    • http://zisukuvi.atwebpages.com/98402965666.pdf
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_7c9a01c12f0941ba87082c0218bc0d6e.pdf?index=true
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_10b5bfc29c72475d841fc7075e6156b2.pdf?index=true
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_1d9800471956438e88bff40d2697b39c.pdf?index=true
    • 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_off0000d11d.bin
a5b9c6fb4b86dabb6ebaf9c85275acf7020eaf0e254afec3bfcde1d45eca4154		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 5708 bytes
font_01_sfnt_off0000e49a.bin
66bc5a8a7a50196ee58271b29f3e313a93718f978169819f5e64d45bbfb790a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE49A 10904 bytes

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