Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9672d7cb25e1d4…

MALICIOUS

PDF

105.3 KB Created: 2021-01-09 17:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 282186ecd06f80f892833f6f2c3224d5 SHA-1: 961a34446ef93cf1ab52956c2cd607c37d882b6b SHA-256: bb9672d7cb25e1d4a8bc55d97f28ad1b5ae422534e84df90cdc462bb1f68d73d
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan variant. The document body contains urgency language, and an external URI is present, suggesting a phishing attempt to redirect the user to a malicious site. No scripts were extracted, but the presence of a malicious URL and the phishing lure indicate a likely attempt to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/aws?utm_term=acc+aha+guidelines+non-+st+elevation+mi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385415/normal_5fdc438bb01db.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/6339450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_5fb78a7e3d17c.pdfIn PDF document text
    • https://rasofenetiko.weebly.com/uploads/1/3/4/8/134862321/7548470.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/dokolesikozoso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366668/normal_5fe0b3973f10e.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/nitidadufetenu/2012_buick_regal_gs_manual_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afeb328c-e623-4d8a-a3de-39019f48fcff/cirque_du_freak_series.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/mathematical_bafflers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/geometrical_figures_information.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/dos_6._22_boot_usb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260c6c14-44a7-4828-95de-581ec28e6338/freedom_writers_lesson_plans_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/queso_mascarpone_la_serenisima_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/90010574236.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_off000160bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BB 5340 bytes
SHA-256: 6dcdb77ec391b197aba31ba9254e227ba72e196c6dbd43a32e3640274dcb5f84
font_01_sfnt_off000172cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172CF 10792 bytes
SHA-256: 7ac9cf6f288813354b708ab501f1afe57a981025ea2cf5d61697d69532708483

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