Malicious PDF — malware analysis report

Static analysis result for SHA-256 9964d374975edf8f…

MALICIOUS

PDF

84.5 KB Created: 2021-04-01 00:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f962cbc0d320fc73c8323253b212a983 SHA-1: 50b129eeb3b07a5288fca879ecacde55734cac00 SHA-256: 9964d374975edf8fb569f32cbd288212697e0b9989eb3106a48d1a67e5a33c06
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high-risk score. It contains an embedded URI pointing to a suspicious domain, 'maypoin.ru', which is likely used to host a phishing page or a second-stage payload. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=37+bcs+written+routine+pdf
    • http://top-agent.ru/citizen_eco_drive_skyhawk_black_eagleuc97q.pdf
    • https://cdn.sqhk.co/zifeduwa/ThdEifi/xepupa.pdf
    • https://cdn.sqhk.co/bugolajoxodu/cVididt/darkness_and_flame_4_walkthrough_bonus_chapter.pdf
    • https://cdn.sqhk.co/bitizulokiva/qqicqt7/47792089661.pdf
    • http://faceit.su/51248241598o8y93.pdf
    • https://cdn-cms.f-static.net/uploads/4391896/normal_60599c7e28723.pdf
    • http://drive4mclaneeffingham.com/47058808662nenfu.pdf
    • https://static.s123-cdn-static.com/uploads/4384164/normal_60054d819d8e2.pdf
    • http://detonic-de.website/mozunuzaxunitewoc5zyo.pdf
    • https://cdn.sqhk.co/rabovafom/hhgmgel/rankedin_spt_goteborg.pdf
    • https://cdn-cms.f-static.net/uploads/4482872/normal_60127aafa6298.pdf
    • http://islta.fun/470092360239mbyg.pdf
    • https://cdn.sqhk.co/kolokejo/gjiqlhf/42868268153.pdf
    • https://cdn.sqhk.co/tokebamojos/hinjbii/jutosakevafepuj.pdf
    • https://cdn.sqhk.co/xavaxonad/cjbgiii/iphone_x_all_ringtones_free_download.pdf
    • http://optarfes.com/freenet_digital_gmbh_o2it3ar.pdf
    • https://static.s123-cdn-static.com/uploads/4380383/normal_6001ebfec8d87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a6f163b-de3a-44c0-ab26-60257ff85e51/autodesk_autocad_software_free_trial.pdf
    • https://uploads.strikinglycdn.com/files/a1d88162-20b6-4578-b86f-0251267c9942/la_divina_comedia_de_dante_descargar_gratis.pdf
    • https://uploads.strikinglycdn.com/files/7f386e26-4988-4b13-818a-7a1606523123/foxepaxevomofusamisedi.pdf
    • https://uploads.strikinglycdn.com/files/76f20f3a-2af2-4619-8a65-a18dd77e3d1b/93690171196.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f248.bin
d151f73b38d8ffe4fe8b3905b704f13d6ec67c9ff755e5afa0bce6f833b7ba17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 5288 bytes
font_01_sfnt_off00010464.bin
b1b1a15e81f923409a9163c47050cee37bd28b6e3c8ed44472ecf897286bd3c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10464 8492 bytes
font_02_sfnt_off0001206d.bin
c42d13a16fe33661e5510523d1a95709b4e23c329d604dc288ac028a789d843f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1206D 10560 bytes

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