Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2badfed47abf38…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 14:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8020788d5ecad8a6e859b0fb9c3842e8 SHA-1: 4ae92c149203f577b645a06daa031d73eb0c718a SHA-256: 4b2badfed47abf38e17b6f141a3c612c779cab4f54dbe4b8927b6bc067c98460
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains an embedded URI pointing to 'https://jacksth.ru/award?keyword=il+cervello+anarchico+enzo+soresi+pdf', which is a strong indicator of a phishing or malware distribution attempt. No scripts were extracted, but the overall context suggests a malicious document intended to trick the user into visiting a harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=il+cervello+anarchico+enzo+soresi+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486374/normal_600d5d62dd07f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_5ff15e62261dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365599/normal_5ff1b242a7c3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_60308b4b144fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_603eb569ae4aa.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/kefiperizonofu/witadeviloxuloj.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/kamerifuxomelikabugebuzop.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/femot.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/zip_file_extractor_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/how_to_become_a_shimano_dealer.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/nikokexobala.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/i_see_fire_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0a2a5f4-7459-43f4-9350-71a8983b13ac/71431154860.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/blank_coupon_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/76881932781.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/how_to_read_and_write_korean_hangul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87ed8eb-301a-41b9-8aae-25847f22c7ce/3594151548.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/66690181806.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/soundcraft_ui12_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07d1402-54b1-4739-8a7a-d10f2351de02/55518156702.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/accident_report_lafayette_la.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fcb696-39d8-4693-a333-bed22f47ec10/76220847930.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_off0000f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 5288 bytes
SHA-256: 9e775d87264803b224fee6f7af88cffeeaa5cf9c0864245025c4730c976ea302
font_01_sfnt_off00010940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 12208 bytes
SHA-256: 835e3cc8fa7b6140616bc24ae10b639339de578ae5eccde164877939eb294427

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