Malicious PDF — malware analysis report

Static analysis result for SHA-256 233e5c09af226d7b…

MALICIOUS

PDF

75.0 KB Created: 2021-03-14 09:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 992805df7c473e7934f7a112f427de34 SHA-1: 9135612aed1ace39af00d8eca0f7ea7f3bbcb032 SHA-256: 233e5c09af226d7b0b89da2fe08eb68e2c73ca0aa181d69de1ca57099368e6db
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to 'expository essay sample middle school'. No scripts were extracted, but the presence of external URIs and the ML detection strongly indicate a malicious intent, likely related to phishing or malware distribution.

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://seumenha.ru/strik?utm_term=expository+essay+sample+middle+school
    • http://jitokinut.iblogger.org/fumaziriburiwafaborefobes.pdf
    • http://konovulibugu.iblogger.org/what_does_the_red_light_on_my_honeywell_humidifier_mean.pdf
    • https://pipovako.weebly.com/uploads/1/3/5/3/135300091/2794615.pdf
    • http://tesazidon.22web.org/basic_colored_pencil_techniques_bet_borgeson.pdf
    • https://niladituzisum.weebly.com/uploads/1/3/4/7/134736231/vovusiforutudo_gulinotale.pdf
    • https://turexebino.weebly.com/uploads/1/3/4/2/134265835/gugevinixosovodo.pdf
    • https://vematonejos.weebly.com/uploads/1/3/1/3/131383464/a156b2cab2d803e.pdf
    • http://kazezol.22web.org/31339351970.pdf
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/lasaviwixejis-kazetibisorivu-dixopamuro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://puredaw.rf.gd/hp_designjet_500_specifications.pdf
    • https://s3.amazonaws.com/rodiligarexo/vigitumetexesitexini.pdf
    • http://kamigawox.atwebpages.com/company_meaning_and_definition.pdf
    • http://xonifovozub.epizy.com/21730164933.pdf
    • http://pimeduzuruwoboj.rf.gd/zukiginewiworib.pdf
    • http://kipejefanowisu.atwebpages.com/trigonometric_identities_for_class_10.pdf
    • https://s3.amazonaws.com/mekonulegipero/keratin_structure_and_function.pdf
    • http://xosumuzav.epizy.com/ludeju.pdf
    • http://dexegesen.rf.gd/ashwatthama_s_redemption.pdf
    • http://vilukuwiw.epizy.com/besa_brodski_dnevnik.pdf
    • http://xoxasosopu.epizy.com/vavuguwiwitodunuzuluwug.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_off0000e8ed.bin
53f514a2394082a1606a0081c07529779d98d5635b6f0a60bc6140ea2ca8c0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 5440 bytes
font_01_sfnt_off0000fb4a.bin
47488af57d1ca0e5ac0e062601a8268d233c819e14dc156c60eb7faca6444176
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 10456 bytes