Malicious PDF — malware analysis report

Static analysis result for SHA-256 7653b4d53e4c19ba…

MALICIOUS

PDF

66.3 KB Created: 2021-02-27 23:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9c018ce5d862af7a1ae95eb3de56a041 SHA-1: a8f2666e567284bfb5328209490ac1ca411b7f66 SHA-256: 7653b4d53e4c19ba4f966955c57151f213e835be714c75e1e3aeed04cd8e290a
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious domains, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'Norton field guide to writing 5th pdf', likely a pretext to direct users to one of the listed URLs for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=norton+field+guide+to+writing+5th+pdf PDF link annotation
    • http://persequenteamsohbet.com/93309094857pai4k.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/82584015989.pdfIn PDF document text
    • http://card2card-perevod24.site/candy_lemon_slices_tiktokostuu.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/gqijiie/pewivixi.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/xawobakobowiwopiwo.pdfIn PDF document text
    • http://a1metromovers.com/playmobil_ghostbusters_cartoonp45a7.pdfIn PDF document text
    • http://weraka.online/wedewimuwofezigigew5zho4.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/41669700618.pdfIn PDF document text
    • http://kelnoteres.xyz/why_are_there_errors_in_the_bible5wbfy.pdfIn PDF document text
    • http://revafazamige.iblogger.org/rome_total_war_2_faction_unit_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifijawubizomed.epizy.com/vizio_sound_bar_manual_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/38902667958.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/going_concern_audit_report_emphasis_matter_example.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/samsung_galaxy_note_4_case_uk.pdfIn PDF document text
    • http://fojupejededoto.epizy.com/chandu_kannada_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/weather_report_of_tomorrow_in_pathankot.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/stihl_ms_180_c_price.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_off0000c788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC788 5100 bytes
SHA-256: 0b44e81c62fdf8e50b0220770b09cf1009ab4a4e1a91032dcb98c1c1c604cb12
font_01_sfnt_off0000d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 10272 bytes
SHA-256: 957bc14d3b84f91bc6805428772703f90216f0e3200119b90771dcec332f369d

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