Malicious PDF — malware analysis report

Static analysis result for SHA-256 861e36b355d811c3…

MALICIOUS

PDF

205.8 KB Created: 2021-01-20 23:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 75148ce9439dafe31d08cef6cc8efa5d SHA-1: 226265d5d2f9dcc2f094dc9f966b81440dfb815e SHA-256: 861e36b355d811c36b3af31f62bde4c598f74a9407078b41e03f45b5b222c2f2
154 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 alert for a malicious redirector link and a high ML score. The embedded URL points to a known malicious redirector, indicating an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://cctraff.ru/123?utm_term=thai+nguyen+genscape In PDF document text
    • https://static.s123-cdn-static.com/uploads/4423428/normal_5fc56efb79c8b.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/f1kibAG/jumpstart_booster_box_magic_the_gathering.pdfIn PDF document text
    • http://nagonakog.22web.org/27052999566.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/ja2hijf/24747165116.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/xufoxorog/anecdotal_notes_forms_for_teachers.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/sixok.pdfIn PDF document text
    • http://linopiziv.epizy.com/arrogance_in_islam.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/92960046786.pdfIn PDF document text
    • http://minirulo.epizy.com/airtel_tv_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/aaliyah_more_than_a_woman_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/vat_audit_report_due_date.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/chitta_punjabi_song_mp4_video.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_off0002e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1C9 4812 bytes
SHA-256: 2287fec91220cb8c5db3fdd33cc0edbb670f5758c32c10ef82a7522d66cd1f9a
font_01_sfnt_off0002f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F21E 12460 bytes
SHA-256: 1a838086dbf940a4d7598c4012db8e72c40bc34470e13abf85d2f3d9c046625e
font_02_sfnt_off00031b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B1B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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