Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2ededafe24f8a5…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 19:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 40045ee0770cd5f335a52b04b650c29d SHA-1: db35791294ebf7036e1c56f23757b2e137e51d2d SHA-256: 7d2ededafe24f8a58397d82453beacdc45c886b33e95b563f5474ad0417a5cac
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=computer+terms+full+form+pdf PDF link annotation
    • http://xapepinozex.22web.org/qualified_business_income_spreadsheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/hizTiib/43273448513.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/wejironaligonatutezonud.pdfIn PDF document text
    • http://chestlune.online/hoja_semilogaritmica_de_3_ciclos064ec.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/luzig-mosenix-zolezitonuw-libikev.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/ab6ca.pdfIn PDF document text
    • http://levojefozaloro.mywebcommunity.org/zeledebafisifalazu.pdfIn PDF document text
    • http://inostrana.com/dirty_emoji_pictionary_answer_keytfmhw.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/nelegokitepigu.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/Yhjsxhf/voicemail_icon_not_showing_on_android.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/here_comes_the_sun_fingerstyle_tab.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/Njgezhd/44435386172.pdfIn PDF document text
    • http://lozajakar.iblogger.org/58692714267.pdfIn PDF document text
    • http://test123test.xyz/1165893530dhpn1.pdfIn PDF document text
    • http://timelessdecorum.com/kulonotesesotogahylrm.pdfIn PDF document text
    • http://magnetfix.store/figurative_language_worksheet_3_answersutr4o.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/hgeSjcV/pinituw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralipuzejemozuz.epizy.com/safazulukurezijunixused.pdfIn PDF document text
    • http://mujunuge.rf.gd/najakuzur.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_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 4884 bytes
SHA-256: 3704cf2fb1383ea7157b15b488a120be7ce34d76cbae82ed9728a4bc0361e826
font_01_sfnt_off00010600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 9888 bytes
SHA-256: 6a934ec18110481c3e05677f2b33be0a7688ab6d463a2bc0f42728b22501be54

Open this report in the interactive analyzer, or submit your own file for analysis.