Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4667d1a475d2260…

MALICIOUS

PDF

81.1 KB Created: 2021-02-28 18:24:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0b870791b690679f2a51790cb072da SHA-1: 75fcd7113454d7771e2260c21df0080abcea4d24 SHA-256: f4667d1a475d22601cc80869b51e80cc36254848a53e40117f5b4f28d6e271f5
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it may leverage PDF vulnerabilities or embedded JavaScript to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=what+does+iatf+mean
    • http://quinzsy-studio.design/get_your_guide_cape_town_contact_detailsy3qy3.pdf
    • http://geniputan.66ghz.com/arerey_manasa_telugu_song.pdf
    • http://tamekawarol.66ghz.com/27228054594.pdf
    • http://mogabaketenis.iblogger.org/blackstar_id_core_v3_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fusarafabar.epizy.com/duvisofobawasorudamizon.pdf
    • http://lalukegadugubu.epizy.com/kupadutoveligepadimukegaf.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/authorisation_letter_format_for_school.pdf
    • https://s3.amazonaws.com/xulepiwa/us_work_permit_form.pdf
    • https://s3.amazonaws.com/vobuturinivi/arqueologia_industrial.pdf
    • https://s3.amazonaws.com/xupimaral/hbo_go_android_tv_error.pdf
    • https://s3.amazonaws.com/forupokisip/93708882103.pdf
    • http://dukedofabi.epizy.com/zomugofeduwefifewibugub.pdf
    • http://makekafes.epizy.com/waec_chief_examiners_report_2017_nigeria.pdf
    • http://selafaveso.rf.gd/boll_and_branch_flannel_sheet_care.pdf
    • https://s3.amazonaws.com/gomaxod/braun_thermoscan_7_irt_6520_chemist_warehouse.pdf
    • https://s3.amazonaws.com/jojitagifuva/tirataburo.pdf
    • http://gepikadagutuv.epizy.com/83610602456.pdf
    • https://s3.amazonaws.com/fumiposamisur/485182348.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f134.bin
5491d62b91c4331e583f278275a432df97ea0b81f74bd67806a8c70f9ab04e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 4820 bytes
font_01_sfnt_off0001017e.bin
92e842236d4cca8ec569073ac0cfa655728ed258b072016611c5b878a06c551e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 12072 bytes
font_02_sfnt_off000128b6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128B6 4324 bytes

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