Malicious PDF — malware analysis report

Static analysis result for SHA-256 4840f903812f0c5a…

MALICIOUS

PDF

155.2 KB Created: 2021-03-30 09:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59453f38198f0caa0e14ed0dc3143bd4 SHA-1: 7a1319a844c6dd92c07f78f2eddcf6c8c321679e SHA-256: 4840f903812f0c5af62f603c12e56a9dfe01f7a2ecd69ae702014caec1f6a292
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords that may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://mezovuduw.ru/123?utm_term=love+feeling+status+video+song+tamil
    • https://cdn.sqhk.co/bijozugetav/jgha9jc/sozurosedorapamiragokir.pdf
    • http://kovafuwir.getenjoyment.net/pakufa.pdf
    • https://cdn.sqhk.co/bonidanem/giU9ide/starfall_calendar_october_2013.pdf
    • https://cdn.sqhk.co/nutewakizi/ozjjDhi/tractor_pulls_near_me_2019.pdf
    • http://purubifo.medianewsonline.com/67402991098.pdf
    • https://cdn.sqhk.co/sunaxidida/ijahgjg/weparilaran.pdf
    • https://cdn.sqhk.co/kamavedes/2hiifiO/divaris_real_estate_zoominfo.pdf
    • http://kidufamipowanot.mywebcommunity.org/36669998608.pdf
    • http://nurigoluda.mygamesonline.org/pojevodisijuk.pdf
    • http://tareworig.mywebcommunity.org/65047654599.pdf
    • https://cdn.sqhk.co/suwojixuwebi/gidA0hg/overkill_s_the_walking_dead_ps4.pdf
    • http://kesisofawa.mygamesonline.org/gods_perfect_law.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_6bad7229787a40d99d45d5291bc00940.pdf?index=true
    • http://mizetum.onlinewebshop.net/air_force_question_paper_file.pdf
    • https://s3.amazonaws.com/rujabepifar/dominion_tower_special_fights_guide.pdf
    • https://s3.amazonaws.com/xamapebonijos/innova_3040_rs_v1.pdf
    • http://jigisasamupor.onlinewebshop.net/is_there_a_reset_button_on_hp_ink_cartridges.pdf
    • https://s3.amazonaws.com/wupixufekijax/fadusisavesuworej.pdf
    • https://s3.amazonaws.com/xupimaral/lowitolegomod.pdf
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_7e07096a686b4acd87859a2a4a37f5f4.pdf?index=true
    • http://tobidogajetu.onlinewebshop.net/83053007508.pdf
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_6d9dd6b9a2b54e428973fa01dd74f797.pdf?index=true
    • https://s3.amazonaws.com/diwitapezu/hcc_screening_guidelines.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001dc1d.bin
3c843a83ae95af96d15a5a2b793b450846700f0fa87b485c479e3545d42f2bb8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1DC1D 26020 bytes
font_00_sfnt_off0001caa1.bin
5609c1972c9f514464c09c1c170a809eea58e2d5346ddb5d8dfaa323745d0269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAA1 5132 bytes
font_02_sfnt_off00021412.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21412 3720 bytes
font_03_sfnt_off00021f73.bin
825c7d6b6e57905ce98334869ed149c1e568d2e1a10ea4c4f95a0db626b49477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21F73 2248 bytes
font_04_sfnt_off000229c6.bin
47a7c26728692c4f8e2bedcbb68bb9ce87e87187707c4e57a4a947801b29ac4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x229C6 16904 bytes

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