Malicious PDF — malware analysis report

Static analysis result for SHA-256 69689dcbf2e702c5…

MALICIOUS

PDF

72.1 KB Created: 2021-02-07 11:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb2b41d383863140988593c97c284347 SHA-1: 5f5a101725d595b4f5e1329464b3dd46ede1456e SHA-256: 69689dcbf2e702c582e5b3dd2d0ebc68aea26df9a79d80c441b5239fff22bf7d
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/wb?keyword=in%20text%20citation%20apa%20format%20online%20article'. This, combined with ML and ClamAV detections, strongly indicates malicious intent, likely phishing or malware delivery. No scripts were extracted, but 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
  • 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=in%20text%20citation%20apa%20format%20online%20article In PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_601b1d272842f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5fec145b299e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_6001c8e13cc80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420476/normal_5ffbb8a6d3fa7.pdfIn PDF document text
    • http://kernig.pro/gds_salary_2018siio0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fe69b05a7121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_601b00ecf0711.pdfIn PDF document text
    • http://m-laskin.ru/ziwil13zi8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387060/normal_5feed7b19100a.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/tubukeganuji/vitaxaguzofo.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/slu_sports_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/14253598705.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/indian_army_warrior_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/adobe_acrobat_pro_dc_to_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/apache_open_office_editor.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/formation_brancardier_a_la_reunion_974.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_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 4988 bytes
SHA-256: 5caaa25598c384f92630a1357f0629f0e05c889cc408196acf3282cff59a4acf
font_01_sfnt_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 10240 bytes
SHA-256: ef88000ca26cd377e091696d6ed792a3f55a34b93192a615d34d50babdf4562e

Open this report in the interactive analyzer, or submit your own file for analysis.