Malicious PDF — malware analysis report

Static analysis result for SHA-256 387c0f2c20a7e17d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-20 20:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55518238654c59bd38d233b7e1da35c SHA-1: 230de642a57e4513addc8aee672f90f791dfedc1 SHA-256: 387c0f2c20a7e17da6f83386727c9db1a467a4b22c68b46662fa3bfa992629a8
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to 'research methods in psychology definition', which is likely a pretext to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/aws?utm_term=research+methods+in+psychology+definition
    • http://ruluzuzadol.mypressonline.com/87821064427.pdf
    • https://cdn-cms.f-static.net/uploads/4486965/normal_603020caa3cdc.pdf
    • http://rawoxaxevog.mygamesonline.org/common_writing_mistakes.pdf
    • http://bavomobes.22web.org/43305360851.pdf
    • http://xodikiz.iblogger.org/adverse_childhood_experiences_questionnaire.pdf
    • https://cdn.sqhk.co/butuxolevu/ujhfxHy/voxubedobiw.pdf
    • https://cdn.sqhk.co/xolanikipiz/eZ4hfhi/quizup_multiplayer_in_counter.pdf
    • https://cdn.sqhk.co/gadukupuwe/gijjdW4/frontline_army_commando_war_battle_games.pdf
    • http://zagavogafewakud.iblogger.org/rawixefageriposubo.pdf
    • https://cdn-cms.f-static.net/uploads/4373769/normal_6056235c874d4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sulijugofogim.onlinewebshop.net/durafejasarapida.pdf
    • https://uploads.strikinglycdn.com/files/b1df5a63-f4a2-4858-8747-51118b57b59d/master_forge_charcoal_grill_parts_ash_pan.pdf
    • https://uploads.strikinglycdn.com/files/ee23c8b7-8e14-44af-b5ad-0c6bae7c731f/logic_pro_x_macbook_pro_2019.pdf
    • https://uploads.strikinglycdn.com/files/be79d80f-6912-403a-8937-427204259975/dijijaku.pdf
    • https://uploads.strikinglycdn.com/files/863c2e9b-f10d-43cb-86de-776149509e75/how_to_program_clicker_garage_door_opener_genie.pdf
    • http://gapoxuvopa.onlinewebshop.net/catalogo_de_cactus_y_suculentas.pdf
    • http://lawaxisagiwog.atwebpages.com/designing_data_intensive_applications.pdf
    • http://monawob.epizy.com/suxozemifemu.pdf
    • http://nerokezixuzat.epizy.com/bedroom_eyes_2017_movie.pdf
    • http://setowibuvi.epizy.com/72905037391.pdf
    • http://guvenaverelud.epizy.com/free_all_web_browser_for_pc.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_off0000ef3b.bin
54a48aafeaf5997f6b91b79325c5b255440bce5c4f24ab6e42b446d23cb3aa68
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 5680 bytes
font_01_sfnt_off00010272.bin
34332ea10821918875e4ba8ca6eac3b3bacc83773578932a3a7918c5d60a0a44
pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 11028 bytes