Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1de08e51065097…

MALICIOUS

PDF

78.1 KB Created: 2021-03-23 21:00:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 47c472193ecd04127b4628a89b23ef93 SHA-1: 90cb730e5620f1fdeac2d2721b00998618a9c484 SHA-256: af1de08e510650970bcd2fe568da1a0cb5e4cbde2a1f7a8ffafb4f31e2ec0636
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise.

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://zajinet.ru/strik?utm_term=how+do+you+decalcify+gaggia+titanium PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374372/normal_605304a015423.pdfIn PDF document text
    • http://dowelatevitik.22web.org/new_auditor_s_report_effective_date.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ffcc1676348d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5fecb70894442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459035/normal_5fe0c1f46da01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_6047f00a2074d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_605942c027165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_603719022afe2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4282b37f-97d0-47c2-b943-67ae448fe585/49865423893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cab6d5-1b1b-436e-ae9f-700b4dd259b4/tidelurugapit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dacfde-400f-4ac6-abf2-99f80d553409/fozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe04fa0-4ce2-4778-883f-18059a1d9a96/breakfast_at_tiffanys_song_chords_and_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a64c92-b8b0-430d-8eb0-0d4737818156/associated_press_stylebook_2019_spiral_bound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1918264d-e438-4e7a-a7cc-648e39a8d0a1/examples_of_recursive_functions_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ce0e03-68a1-4ebd-992b-ffa579f65256/saner.pdfIn PDF document text
    • http://patikogoxuxit.epizy.com/bonofebuwurafofewixuwobad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c080ddc5-d8c3-4ee9-8d8c-b9d9a2fbb95b/how_to_play_spades_with_partners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cbd05d-a99d-493d-ad94-f88cfac397f5/how_to_use_imovie_9_on_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17729852-8c7f-4ef6-8790-1e443988f30d/the_one_minute_manager_full_download.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_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 5220 bytes
SHA-256: 0b7c0f287bc1516fc4dde0c18be1f63ce0ed369abc445b54ecc6809c8c938407
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 11276 bytes
SHA-256: 3bc685b77ac87015d37a19f42b671cb6a4f74d89194124542894b7e947c70774

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