Malicious PDF — malware analysis report

Static analysis result for SHA-256 61690d302bd0af24…

MALICIOUS

PDF

76.1 KB Created: 2021-03-27 17:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 630d63ae1012a6dbcfe1d4add230f80c SHA-1: 680bd412a60a841cf327c4040f350b81dd58c8ff SHA-256: 61690d302bd0af24fe6eb17c9a1073e053e0db63d6aba2c5990e7e9486486f8e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to technical specifications to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=can+bus+specification+pdf
    • https://static.s123-cdn-static.com/uploads/4476765/normal_5ff3ee24f28ce.pdf
    • https://cdn.sqhk.co/zufuxirap/JyiaMja/marajufipuzujofaf.pdf
    • https://cdn.sqhk.co/mojubemuwek/jcjfRie/bridge_construction_simulator_v1._2._7_mod_apk.pdf
    • http://duvazejezirofid.22web.org/foxit_reader_for_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4462073/normal_5fe65801b62fe.pdf
    • https://cdn.sqhk.co/vebiziwob/ifMN9jd/ihss_online_timesheet_login_sacramento.pdf
    • https://cdn.sqhk.co/nezosomoji/hbxjj3a/packers_game_stats_vs_texans.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://ganusigesu.rf.gd/nail_salons_open_sunday_greenville_sc.pdf
    • https://s3.amazonaws.com/zukogi/18493225164.pdf
    • https://s3.amazonaws.com/vipinib/30616482557.pdf
    • https://s3.amazonaws.com/luborinizu/hp_laserjet_pro_400_m451dn_color_laser_printer.pdf
    • https://s3.amazonaws.com/bejenosugede/hungry_shark_evo_hack_ios.pdf
    • http://lusiwavi.rf.gd/any_video_converter_software_free_filehippo.pdf
    • https://s3.amazonaws.com/salosibejodod/repida.pdf
    • https://s3.amazonaws.com/bogijexu/kptcl_je_exam_question_papers.pdf
    • https://s3.amazonaws.com/vunizi/the_holy_quran_recitation_by_sudais.pdf
    • https://s3.amazonaws.com/wazotojemov/35888075908.pdf
    • http://gosigolixadi.rf.gd/teaching_english_as_a_second_or_foreign_language_4th_edition.pdf
    • https://s3.amazonaws.com/pilazi/vunakewojidekiluserer.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_off0000ddf0.bin
34671114422e78cf397b3042fee10a13ca039a427f44be28842be73cb3d56734
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 5068 bytes
font_01_sfnt_off0000ef41.bin
f8158fa7f5a4b133fd1e5b5ae2ad8e20fb3f927891dd93a86e6d96c670bc99ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 11048 bytes
font_02_sfnt_off00011504.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 4324 bytes