Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6f54db6b63b397…

MALICIOUS

PDF

78.0 KB Created: 2021-03-01 16:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af832e20facd12a5e90e126646d99ef7 SHA-1: d09f62fdc16991ec4e74449541cdaff602389f5f SHA-256: 1c6f54db6b63b397f7066a3ad1121cf30a3501e17cc6632856cd94f812bbe878
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=asus+rt+ac66u+router PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fc7b8a7dc8cd.pdfIn PDF document text
    • https://nifixivenugoku.weebly.com/uploads/1/3/1/8/131856212/vexunev-domilaki-padosasi-kezirularipe.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/biluzijumekof.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/html_css_for_dummies_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411686/normal_6024a11276e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_60130717c503c.pdfIn PDF document text
    • http://expo-kit.ru/74615348448gs6ag.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/will_amox_clav_875_mg_treat_tooth_infection.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412195/normal_5ff87f86224b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 4904 bytes
SHA-256: fe27e18ae11f1e8a344739113c81794d904506c60c0a5ebd3c2839c0888ecca4
font_01_sfnt_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 18560 bytes
SHA-256: 64148b542761f1db57f875bf256549fc3e596bddb58bee4bffcdb4b6752a51af
font_02_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 16144 bytes
SHA-256: 4b39140c652e6d058fe59e0172338ed7e0b8c56e7cdf0ba82c6c8c4172db5d18