Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e113a1f8b6d170…

MALICIOUS

PDF

82.4 KB Created: 2021-03-30 17:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f366458dfb4b9984d5c218110167fc0a SHA-1: c18fe811f8be0e0b3df96ab02c52ee3e3afdeac5 SHA-256: 71e113a1f8b6d170be810bc0c3e06d80829af5d63dd15020c27379cad1463453
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains text related to 'Animorphs book 3 pdf' and the file was generated by wkhtmltopdf, suggesting it's a crafted lure. The primary IOC is a suspicious URL embedded within the PDF, likely intended to redirect the user to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=animorphs+book+3+pdf PDF link annotation
    • http://fejukoturig.medianewsonline.com/where_to_watch_big_blue_madness_2020.pdfIn PDF document text
    • http://megatorg.ru/494604868067x651.pdfIn PDF document text
    • http://prechambre.xyz/8115964234059pmk.pdfIn PDF document text
    • http://titanovyi-filtr.ru/convert_mp4_to_midi_onlinekmajn.pdfIn PDF document text
    • http://gamedv.design/bose_wave_soundtouch_music_system_reviewfxb3g.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/nemud.pdfIn PDF document text
    • http://begemotiks.space/38311954063yodoz.pdfIn PDF document text
    • http://tublitalia.space/goodbye_deponia_trophy_guide_and_roadmaptcxzc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wixatax/lenticular_sheet_with_adhesive_backing.pdfIn PDF document text
    • http://xewenofos.epizy.com/74979754963.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/crown_xti_2000_power_amplifier.pdfIn PDF document text
    • http://pubopebiwofaz.epizy.com/bilingualism_and_its_types.pdfIn PDF document text
    • http://tosaxope.rf.gd/biochemistry_laboratory_rodney_boyer.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/3101208178.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/rca_voyager_tablet_with_keyboard_walmart.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/ownership_structure_and_dividend_policy.pdfIn PDF document text
    • http://zejowupifodoj.rf.gd/61881219845.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/acrobat_reader_8.pdfIn PDF document text
    • http://nuzubiwow.epizy.com/award_show_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/editing_estimate_template_quickbooks_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 4988 bytes
SHA-256: 1cb9cb28f751f048134406ec23b44bd9d8d2f6009c64527d23976733c4980953
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 10876 bytes
SHA-256: cbbac2277d0964d522ca06a2a8a6c3de0fcf58e671b0187230918aa29917f7ba
font_02_sfnt_off00012e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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