Malicious PDF — malware analysis report

Static analysis result for SHA-256 6158f470d7779f14…

MALICIOUS

PDF

85.9 KB Created: 2021-02-12 03:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 897d99b7fa80837b075cefb00dcf9f80 SHA-1: 116ef641c20d08652dc31697aadb55f67b6614da SHA-256: 6158f470d7779f148a4e7555650ff495bfd414d2df92ac3c7e5716607c5c0146
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=tfot+guide+pdf'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=tfot+guide+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_600093198c86b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454665/normal_5fee11c2283d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_6025bada55d9f.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/b4jgTgh/all_grail_knight_cosmetics.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/1DibBbL/moto_racing_traffic_race_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/hjdhgih/21411711908.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/ijnkQif/suzogodu.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/hbrhhHM/rise_of_kingdoms_sarka_talent_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/jxhiUjc/busowirozeju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472503/normal_6013c04d30c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366017/normal_5fc6282553f69.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/dimplex_blf5051_installation_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://borovob.epizy.com/botines_con_plataforma_y_cordones.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/davoniv.pdfIn PDF document text
    • http://buwepuxaj.epizy.com/bewakoofiyaan_full_movie_free_300mb_worldfree4u.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/letter_tracing_worksheet_creator.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/firmware_samsung_j7_2016_indonesia.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_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 4644 bytes
SHA-256: 3ba10b4d67ae00a3d08477c96e51b958a893f4dc3f8eeec285a3b189b13b0ce5
font_01_sfnt_off000126b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B4 10588 bytes
SHA-256: cbb9c3a8d42475cc5e1c5e22c00fea5f7a33fd153517ce9239498327c0f19e43

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