Malicious PDF — malware analysis report

Static analysis result for SHA-256 b506f84537c8f20f…

MALICIOUS

PDF

78.8 KB Created: 2021-02-20 11:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7551b0c0f1b6a7bb00646d1e4eed22a2 SHA-1: d44557eb86fa0ca8c7a4d41a814e9a612facc683 SHA-256: b506f84537c8f20f60bcf644ed53a707e16fab9da6cb3d25604dfaba93ae264b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential external URI and an embedded URL. ClamAV and an ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of external URLs and the high confidence malicious verdict suggest an attempt to redirect the user to a harmful site, likely as part of a phishing campaign.

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://druttle.ru/strik?utm_term=power+pressure+cooker+xl+home+canning+book PDF link annotation
    • http://kozlo.space/80069413432f3m1k.pdfIn PDF document text
    • http://montana-media.com/liviresuxubutafofufinukisljhh.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/ekadantaya_song_mp3_free_download8dbc1.pdfIn PDF document text
    • http://mavitrade.com/sigil_magic_in_hindiqbcr7.pdfIn PDF document text
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/renizimewadebizuxoda.pdfIn PDF document text
    • https://terimigekebala.weebly.com/uploads/1/3/0/7/130738799/b10309df0c.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/XhfjiC5/18698647922.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/hdLLpUU/89063338106.pdfIn PDF document text
    • http://topsale.pro/58970847008sonfc.pdfIn PDF document text
    • http://fringigejy.site/pdf_to_word_app_freesav0b.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/MggJgeW/background_remover_high_quality.pdfIn PDF document text
    • https://refanoripusegu.weebly.com/uploads/1/3/4/3/134306014/1fcfad.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/dekogamik/aetna_dmo_dental_specialty_referral_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/15461122825.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/injury_incident_report_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/99299647497.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_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5712 bytes
SHA-256: b21b1a4af384547ca4f9c8270827b31d435d6498510542fd5abb4f2de4a0e797
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10408 bytes
SHA-256: aa17a5c83b282ee7ad5defdfbe09b4fac9535e0338e94b4e2cdac3adc4f51185

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