Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61278e4203c9d9f…

MALICIOUS

PDF

105.2 KB Created: 2021-03-14 20:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 983ecc2c46998346cd5afb0c160fbb7f SHA-1: 22dda8842a53d87cae286fc2d627aba00a4418b8 SHA-256: f61278e4203c9d9fdef520b099afd81b8c64681be78c6d4d314db44af5e003ea
136 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it's a password-protected archive lure and contains embedded URLs. The embedded URL points to a domain associated with phishing or malware distribution. The document body, though heavily obfuscated, contains text related to administration and a PDF keyword, suggesting a lure for a fake document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/award?keyword=administracion+de+peque%25C3%25B1as+empresas+servulo+anzola+pdf
    • http://umniashka.ru/8606520786101ppv.pdf
    • http://newsportstechnology.ru/sizirotibinupizerowitoiq2k7.pdf
    • http://lonumawewexupo.22web.org/chirutha_songs_320kbps.pdf
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/lekekafiridi_lumoduxufiw_tekedano_fasadexuxux.pdf
    • http://cmb-accueil.com/27089954594yghti.pdf
    • http://onlyforyou.space/hypercalcaemia_of_malignancy_guidelinesfib0w.pdf
    • http://fulilip.iblogger.org/usps_overseas_mail_forwarding_service.pdf
    • http://registrat.space/gixolirl3daj.pdf
    • http://beliyden.xyz/minadafofotea4chj.pdf
    • https://wefenofutote.weebly.com/uploads/1/3/4/8/134873272/kobot.pdf
    • http://freshnatur.fun/pabujubanibihoomt.pdf
    • http://daravto18.ru/tesoduvojokuxegutit31r9.pdf
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/gebubolaxumiti-sumos-noxerinakisabut.pdf
    • http://tokio-2020.fun/412926028807e5rk.pdf
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/mefolinovez-fifupaxoma.pdf
    • http://verifybadgehelp.com/985116944956w1xk.pdf
    • http://obschee.xyz/51517849131nk76v.pdf
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/wazetikuribo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lejipuresip.rf.gd/wimodo.pdf
    • https://s3.amazonaws.com/fusopoxipo/8033638465.pdf
    • https://s3.amazonaws.com/fotepopunaj/pulupivibumerurim.pdf
    • https://s3.amazonaws.com/gumegulaxi/wastewater_treatment_book_free.pdf
    • https://s3.amazonaws.com/lakadutof/dj_hans_remix_bhangra_song.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143c8.bin
ad09ccbaf17209508ed1c71829af5953338e07eb7a956f294e500ac67fdee133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C8 5736 bytes
font_01_sfnt_off00015702.bin
86e3856833a7be8f2f595e176276edc2d4963419d55d512f735fbadbee0833e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15702 12516 bytes
font_02_sfnt_off00017f30.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F30 16092 bytes

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