Malicious PDF — malware analysis report

Static analysis result for SHA-256 e866916359ba7040…

MALICIOUS

PDF

65.6 KB Created: 2021-04-27 22:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae624701cdf7f5dda73d09f76cd8f234 SHA-1: 6297493d65a6e8b217f9b98f07890f542e20a6f0 SHA-256: e866916359ba70402319d1d5d992a0eb95fd7b7ba5dfccdf1f41cc8c73d07016
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to academic review materials. The primary attack vector appears to be directing the user to a malicious URL, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=physics+a+first+course+chapter+4+review+answers
    • http://cenderaoriginator.com/how_long_should_a_personal_statementh2jle.pdf
    • http://dfahsdfgjsfg.online/will_there_be_a_part_2_to_the_darkest_minds0vrbh.pdf
    • http://eu-study.ru/60041883231tovov.pdf
    • http://uscovidcharts.com/achilles_building_confidencek68y3.pdf
    • http://slimitalia.space/stihl_011_avt_parts_diagram2htw6.pdf
    • http://autocredit.moscow/borescope_inspection_reportg3k0r.pdf
    • http://ruzamaji.getenjoyment.net/dupematugejowabiweripo.pdf
    • https://cdn.sqhk.co/mugegiduveb/cieTxt0/gowatevalev.pdf
    • http://golomashvanna.xyz/tenu_ishq_mera_le_duba_song_downloadrpl8j.pdf
    • http://tozofuji.scienceontheweb.net/gerao_baby_boomers_x_y_z_caracteristicas.pdf
    • http://startbastar.online/what_does_the_term_organizational_structure_mean_in_businessdozrm.pdf
    • https://cdn.sqhk.co/tebefaravuz/7gfgijd/lenovo_thinkpad_e14_gen_2_review.pdf
    • http://esclick.pro/esv_single_column_journaling_bible_large_print_reviewif1c6.pdf
    • http://vudifabofugejij.medianewsonline.com/kaviritukevurikufu.pdf
    • https://cdn.sqhk.co/fejovuwov/cWphmTK/zifazobaz.pdf
    • http://m-laskin.ru/bidavutujadolumepaze5ln2v.pdf
    • http://subonus.ru/zodepisuzunelifwsfxk.pdf
    • http://reduslim-ufficiale.website/nisekafoleloluxepupan0dxip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kegigija.atwebpages.com/jajanumugawitavoj.pdf
    • http://saxarivoje.onlinewebshop.net/hogwarts_a_history.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c37b.bin
69884ae64027a399dbd499cb276ae2bcd5f976c75e2c5080c4e81e8a4af0771d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC37B 5412 bytes
font_01_sfnt_off0000d608.bin
3b2c29f4f31d19b8d8a6aaa6ed49226627d2e2dda4f8dcc987d9595c5a3d6947
pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 10404 bytes