Malicious PDF — malware analysis report

Static analysis result for SHA-256 6459d5ebc306b458…

MALICIOUS

PDF

83.6 KB Created: 2021-02-24 12:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9e77db8db009590876ed88affcfae476 SHA-1: d92dc0b2e900f984994a74455082b01ad31247cb SHA-256: 6459d5ebc306b458c51e34037c1d959e4d57fadbb1510186fb7dcf8f235dde1d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as a worksheet. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary IOC is the external URI pointing to a suspicious domain, likely used for phishing or malware distribution.

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://maypoin.ru/wix?keyword=note+reading+worksheet+bass+clef+exercise+%25231+answer+key PDF link annotation
    • https://cdn.sqhk.co/kutupejotige/Jghjhgi/92879812938.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/GNyygcI/66367926801.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/h7uXSjd/cnc_programming_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/jNghvic/digezudebevinapiwumitegab.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumabigige/70OghLo/puwagavovulo.pdfIn PDF document text
    • http://daddytestit.xyz/sql_tutorial_freef22m6.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/T7eS7gf/crossfire_xt3_15.pdfIn PDF document text
    • http://zelopaqq.xyz/vendo_vending_machine_lockxnypm.pdfIn PDF document text
    • http://best-ital.fun/chegg_answers_free_hackou8t0.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/iaicVpb/my_talking_tom_online_play_in_jio_phone.pdfIn PDF document text
    • http://the-job.ru/audiosurf_music_downloadf3l0m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/negonanopix/android_21_hair_xenoverse_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/91570492234.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/sakufakixaxomibe.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/82792300576.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/cp_company_t_shirt_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/temoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/64820135414.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_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 5616 bytes
SHA-256: 199702b3ed200af03041b7fb61afd261ece081dc059c3b36b7f27d1ccd59b0cb
font_01_sfnt_off00011809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11809 12704 bytes
SHA-256: dbb03a8001e59de3f1dc19598d9bd1b12ea97c3a6166c6f4d5d6b797c8604b07

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