Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b9e3987f71dab2…

MALICIOUS

PDF

75.2 KB Created: 2021-03-31 21:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 094e6ab6fb21fabb86a98a21086ababe SHA-1: 9d79c1e8433945bebcd04b30b19bdcf15aa04540 SHA-256: 54b9e3987f71dab2fc43664fa03cbdb6f3bf3d42e3c8ef7ba3df976e7f3c9a5c
96 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. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to academic answers, a common social engineering tactic.

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://jacksth.ru/wix?keyword=lattice+energy+pogil+answers
    • http://blue-tick-central.com/35416499542ncmfw.pdf
    • https://cdn.sqhk.co/sovajepuxe/jhXgdjf/72707054284.pdf
    • https://cdn.sqhk.co/nikapeke/geDgflX/best_warships_today.pdf
    • http://avlto.best/denon_dcd_685_ebayc5bxs.pdf
    • http://dofujifeluradep.medianewsonline.com/saks_5th_avenue_walt_whitman_mall.pdf
    • https://cdn.sqhk.co/tezizejaropu/jijjchg/teaching_experience_certificate_sample.pdf
    • https://cdn.sqhk.co/fedovipawe/gcheIhd/99578985347.pdf
    • http://jekeluxuto.mywebcommunity.org/descriptive_geometry_textbook.pdf
    • https://cdn.sqhk.co/bapuwanuvadi/Jbegihd/khan_academy_8th_grade_math_worksheets.pdf
    • http://de-bewertung-889562.icu/stardew_valley_best_combat_gearuflog.pdf
    • http://paksorond.xyz/sony_soundbar_ht-xt100aihta.pdf
    • http://harkateine.fun/mitanabajakomiloviv8vj1.pdf
    • https://cdn.sqhk.co/darekomeguv/hauTYgj/manager_tools_interview_questions.pdf
    • https://cdn.sqhk.co/nawafoxobok/himhjha/page_views_counter_html_code.pdf
    • http://medtechnika1.ru/nogewuraninijasovugipogutkiemf.pdf
    • https://cdn.sqhk.co/varugefezum/pTzRjUi/44379377545.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kopisigapub/tijejezerotavov.pdf
    • https://s3.amazonaws.com/pasawe/24768983242.pdf
    • https://s3.amazonaws.com/pusori/premier_protein_chocolate_shake_sams_club.pdf
    • https://s3.amazonaws.com/pazerogasarinu/nanobi.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/bewewudofawap.pdf
    • http://diwavubodinaroj.myartsonline.com/how_to_reset_whirlpool_dryer_duet.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_off0000e9ac.bin
a1a30b1dd63e1984ae8e22d1ebebbc351281d87de4664c038ab7be9b5e054f53
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5236 bytes
font_01_sfnt_off0000fbaa.bin
45365c95076815a87a097ea9e01da22b76995a5cf701223eff11bcec87c0dcaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAA 10508 bytes