Malicious PDF — malware analysis report

Static analysis result for SHA-256 a517fbe124468aa1…

MALICIOUS

PDF

83.9 KB Created: 2021-03-29 15:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6b9666d99ebd9c22fd46ffbf602624b SHA-1: 9bf0d6ad9496d1fe1124fd69f0b83341cb2c497c SHA-256: a517fbe124468aa159a40921c16073715aeddffa4a041f66bb2b02125ce9dee6
96 Risk Score

Malware Insights

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

The PDF file contains a URL that directs users to a website promoting a 'best cricket betting app for android'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or scam attempt. No scripts were extracted, but the presence of an external URI is a key indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/123?utm_term=best+cricket+betting+app+for+android
    • https://cdn-cms.f-static.net/uploads/4404290/normal_6022bb96d60dd.pdf
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5ffc0f2d0c0dc.pdf
    • http://about-central.com/moto_360_2nd_gen_battery_46mmkq5sl.pdf
    • http://greatholl.com/can_you_please_answer_me_traductioni9w9j.pdf
    • http://tegor.xyz/business_analyst_education_jobsnd9q1.pdf
    • https://cdn.sqhk.co/zumumolebajo/KeXjcid/psx4_droid_pro_apk.pdf
    • http://igbusinessabouthelp.com/acca_qualified_jobs_in_canadaf5iks.pdf
    • https://cdn.sqhk.co/xojelumegasi/3Ohajdg/vabom.pdf
    • https://cdn.sqhk.co/zatufora/ggXtVhi/62445239844.pdf
    • https://cdn.sqhk.co/tibakekavero/cyE6jhI/79433859243.pdf
    • http://forsage.pw/611738681370inmw.pdf
    • https://cdn.sqhk.co/bapuparit/jjz2thg/funny_pictures_of_cats_on_vacation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/12a99c2b-1a76-4451-91c7-0f8fbf7e32bd/pexewevunixivu.pdf
    • http://zewesibapinite.epizy.com/88106241859.pdf
    • http://familule.epizy.com/love_letter_powerpoint_template.pdf
    • https://uploads.strikinglycdn.com/files/3eadf8c8-cb8f-4485-ba83-1a0e3ad982a4/kujikamesux.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8eb.bin
dd22610ce56f1af190b6bc79dce2b0f67d10985497ec97aec8c2c6bbf65262b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EB 5332 bytes
font_01_sfnt_off0000fb15.bin
fe5c4c1d71904f1aadd0eabc9a87056c58c91e4694e77f950002c3a5f0f2e65b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10372 bytes
font_02_sfnt_off00011e89.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 16164 bytes
font_03_sfnt_off0001339e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x1339E 4324 bytes