Malicious PDF — malware analysis report

Static analysis result for SHA-256 067858311efee2ce…

MALICIOUS

PDF

65.6 KB Created: 2021-02-15 05:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 920f07ef7c6856e1ba994bed7dd4b58a SHA-1: 68d7e1526da01152cf38ffcb143e20c54679b4b7 SHA-256: 067858311efee2ce263fcd6eace9784feb4ac56e2d5a05dae8d705b3ec7d567d
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector that uses the keyword 'ccleaner professional trial version', indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to trick users into downloading potentially unwanted software.

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/wb?keyword=ccleaner%20professional%20trial%20version In PDF document text
    • https://cdn.sqhk.co/notizejamebo/h4bijge/24520700825.pdfIn PDF document text
    • https://cdn.sqhk.co/boxadiweteve/Uxgghij/vuxivunugok.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/igjdLkg/clock_change_date.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/ahghhgd/bugujeziguretewar.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/d5Lidhg/fort_worth_stock_show_and_rodeo_2021_cancelled.pdfIn PDF document text
    • http://manthoughtswebsite.website/hipoxia_y_asfixia_neonatal8fxsh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5fe9b7eab74a1.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/jfhhohj/mccarran_airport_control_center.pdfIn PDF document text
    • http://stavki-na-sport.site/88436066612sgpf7.pdfIn PDF document text
    • http://mnatural.space/adobe_illustrator_cs4_tutorials_for_beginnersvxevl.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/g0jbsia/chata_sutovska_fatranka.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/HjjdjcH/vakikana.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/fhbjjcV/managed_wordpress_hosting_godaddy.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/xeponodij/fufewaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/sabar.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/the_scarlet_letter_chapter_3_answers.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_off0000c72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72F 4972 bytes
SHA-256: 109b9ffb1c535cf2677caa0cefc1dc1c9a547497a98a05ab103ad174246a4552
font_01_sfnt_off0000d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82D 9792 bytes
SHA-256: 5026be5d3c0e699908c5ab2a75ff2f52add74cc425b3db684b94b2a6551cc12d

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