Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d8157606810956…

MALICIOUS

PDF

76.0 KB Created: 2021-02-27 07:30:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 015908005d0db54e67829ddc6b3debd4 SHA-1: 15eaa2f5762be4b9ec779410241ae743a17023d4 SHA-256: 79d81576068109569c733a3a7a2f0958409142c832da59cded2dacb72c0191e0
156 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a lure for recovery secrets or private keys, indicating a social engineering attack. An external URI was also extracted, suggesting potential communication with a malicious server.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jumiwimov.ru/strik?utm_term=what+are+the+concepts+of+oops PDF link annotation
    • https://cdn.sqhk.co/nedabuke/gc8gh0X/uefa_champions_league_2019-_20_table.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/aEghN3n/traffic_moto_hd_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jia6phf/connecticut_natural_gas_pay_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/hTjejiM/you_tube_greatest_country_love_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/cCqzU2X/petafa.pdfIn PDF document text
    • https://cdn.sqhk.co/mabisurud/fhaifhf/moonbox_sandbox_zombie_simulator_mod_apk.pdfIn PDF document text
    • http://powerhdniy.space/fiwubelaregife6r5u7.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/hf0jajc/vodafone_yan_mda_sifre_alma_mesaj_gitmiyor.pdfIn PDF document text
    • http://reetodo.online/bisection_method_questions_and_answersidrhb.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosobupis/gfhghij/say_hi_in_spanish.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/fowokurefabokesifegom.pdfIn PDF document text
    • http://divifafapinuk.rf.gd/balance_druid_pvp_guide_3._3._5.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/27525434097.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/nedoxezavavaginonowipow.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 5084 bytes
SHA-256: 198ca85192a73b67b0a1988235da21aef3f1271d50b7fe7f70e43bcdcb118adf
font_01_sfnt_off0000fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 11768 bytes
SHA-256: a6f8bec8e8df40ced83a8c3151d7e5062e694a8378a3619e42e186e3645c0726

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