Malicious PDF — malware analysis report

Static analysis result for SHA-256 35364d8d079ae6cd…

MALICIOUS

PDF

63.2 KB Created: 2021-02-14 17:14:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5abc0db0787d5f2f71a75f1fb97819a2 SHA-1: 22201d03c58f465e83fcc94d1d7b60a61c522339 SHA-256: 35364d8d079ae6cdea7222461385827f5ba73e0bb914c5f36165be451fdc16e9
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is https://seumenha.ru/123?utm_term=danby+window+ac+owner%2527s+manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to a malicious site.

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
  • 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://seumenha.ru/123?utm_term=danby+window+ac+owner%2527s+manual PDF link annotation
    • http://pukutabutosu.22web.org/81950061456.pdfIn PDF document text
    • https://cdn.sqhk.co/nisosawero/xxhchid/car_crash_videos_youtube_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vexagajezesa/jjuNEYi/drive_by_exploit.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/cuRxhhS/pinebozunobirate.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/3SifBje/66899168233.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/RlZjchf/jalugegosobeduvuwulofe.pdfIn PDF document text
    • http://sacredname.ru/2019_election_results_south_africawd19k.pdfIn PDF document text
    • http://bazis-rostov.com/998435745580s7yz.pdfIn PDF document text
    • https://cdn.sqhk.co/gasawivu/jcMFigh/this_song_hit_different_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/9eieieP/59358916079.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/FGjd4hh/management_skills_assessment_program.pdfIn PDF document text
    • http://nout-prokat.website/astrologian_rotation_guidejl6ts.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewerikipij.rf.gd/buvepojekisegumigek.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_off0000bb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8B 5452 bytes
SHA-256: b2d7f9c4e9922dbaa3c7c4d17f3b38590aa84d5cca98d99bef4c7d1a65d2a64a
font_01_sfnt_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 10152 bytes
SHA-256: 5fb338e1542a85c603037917ccd455d8e0f5810a3231fcde6db963b4685554a5