Malicious PDF — malware analysis report

Static analysis result for SHA-256 073088f7d51ad9d1…

MALICIOUS

PDF

74.9 KB Created: 2021-03-13 12:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0dfd07e8a65009d4534b7312520d15 SHA-1: 55f128001ec004fa07495a394f48189a3d6e97af SHA-256: 073088f7d51ad9d1d75f7de56d11ab3f167a7d8cc0b48da0d7596b6094af1642
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to 'crop protection guide pdf'. No scripts were extracted, but the presence of external URIs and the phishing detection strongly indicate a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/123?utm_term=crop+protection+guide+pdf
    • https://cdn.sqhk.co/rasetiwulipu/XjfjbA2/star_wars_timeline_movies.pdf
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/fetuxo.pdf
    • http://baxosemot.iblogger.org/20531523597.pdf
    • https://cdn.sqhk.co/ripalufix/5hegghc/paypal_login_my_account_paypal_login_page.pdf
    • http://funasowuto.getenjoyment.net/30398465698.pdf
    • https://sipebiwamedewor.weebly.com/uploads/1/3/4/7/134707389/jitaletofepuvaz.pdf
    • http://zonerokemub.getenjoyment.net/jatuwikumufun.pdf
    • https://cdn.sqhk.co/wafabojunawa/tSgijbk/86218988535.pdf
    • https://tetaretutu.weebly.com/uploads/1/3/4/8/134872422/renav-jopaji.pdf
    • https://cdn.sqhk.co/xotosobupis/Njcaigc/the_wonder_weeks_download_free.pdf
    • http://xafopawiki.medianewsonline.com/cambridge_english_for_engineering_mark_ibbotson.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/08cd2dfa9ac4.pdf
    • https://cdn.sqhk.co/devisojop/enjaBhh/halloween_party_ideas_for_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fodose/ps4_emulator_for_android_phone.pdf
    • https://s3.amazonaws.com/jemisajoda/49947175782.pdf
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_ebd3451b4d35446ca826e1bc584d665f.pdf?index=true
    • https://s3.amazonaws.com/seriposuj/kodak_alaris_s2060w.pdf
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_4c4d4881f39946d29adc271878adc27f.pdf?index=true
    • http://dajovufozimok.epizy.com/vopelebavodoradazevezev.pdf
    • http://gapoxuvopa.onlinewebshop.net/what_is_starcraft_vinyl.pdf
    • https://s3.amazonaws.com/bufexa/40456297996.pdf
    • http://tufuripisaren.epizy.com/wajitemavitakedojelopokok.pdf
    • http://laxuraxosolun.epizy.com/broadway_light_bulb_font_free.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_off0000e876.bin
6d5a01d2d106f11486af0d273f12a11ca7ed8949cd534a575375def34c1aaf4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 4808 bytes
font_01_sfnt_off0000f8e5.bin
58e2bc996388c5bd1f2d22453d9d1cc03d31e7830ec8204ffa50f0eebb65efaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 11040 bytes

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