Malicious PDF — malware analysis report

Static analysis result for SHA-256 f805f91873bf8af8…

MALICIOUS

PDF

83.0 KB Created: 2021-05-22 03:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6b72d329b8295f3788da54fdcc7eebf9 SHA-1: 17f47c4be06fbff9ae85d69c997ecd4d224b31af SHA-256: f805f91873bf8af8c5c39a586b64374f4a3d5f630f452ed32c10e00d3aae655d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure for a free PDF download, which is a common social engineering tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=chakras+for+beginners+david+pond+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fe508e7520fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_6063ae0c98ad3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ff64f94c51a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_6043dd0fcdd81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_60383d47de994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403561/normal_5fe5976fa725c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_604d81bbca672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5fdcb15bb24a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_600f6bab4140d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445729/normal_5ffb5b13bc258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/penale/lightroom_6_keyboard_shortcuts_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/zemowujovoburezowadup.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/at_t_u_verse_remote_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/ucla_bruins_logo_in_vector_format.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/65966352018.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/pemolebajarekukad.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/making_compound_sentences_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/lg_sound_bar_2._1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/td_jakes_soar_book_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/xozevamasiluzusenigux.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/lumaladetizomuvejafo.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/blue_and_white_christmas_lights_target.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/ozito_electric_chainsaw_1800w_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 5392 bytes
SHA-256: c383f6dad5bd79f27c433e556ec93038adfd77d5c93598b7782fcfc48aa808d9
font_01_sfnt_off000109ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EF 11076 bytes
SHA-256: da8f0558de0f6820fa932d32180bb73c1cbc4e6413286aa3c99c6ef5a3a41aff
font_02_sfnt_off00012fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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