Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16450a7434b1b49…

MALICIOUS

PDF

67.2 KB Created: 2021-02-22 07:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8b84213fd4f3fa822821b95d889259d SHA-1: ba9adf5daa084000035029b04cfa25dae65bad7f SHA-256: b16450a7434b1b4905f29ecddf3dbf30d6724dd9ec25a55c3a62566de8821f3a
96 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=herricks+community+center+events
    • https://xivapumi.weebly.com/uploads/1/3/1/6/131606059/dekew.pdf
    • https://wukarogokemek.weebly.com/uploads/1/3/0/7/130739107/xugosonotoxizun_manew.pdf
    • http://price-list.moscow/anydesk_for_raspberry_pi066nh.pdf
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/tazavefogi.pdf
    • https://static.s123-cdn-static.com/uploads/4489846/normal_5fe2f6fc00276.pdf
    • https://cdn-cms.f-static.net/uploads/4451970/normal_5fd0bece596f3.pdf
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/sibuluzewabo.pdf
    • https://lopifonexebifi.weebly.com/uploads/1/3/5/9/135986218/miziw_gakuw.pdf
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/5067292.pdf
    • http://laxana.ru/lofefuwixes9uxh.pdf
    • https://cdn.sqhk.co/sovokeduseb/2id2ojj/1262611596.pdf
    • https://static.s123-cdn-static.com/uploads/4405419/normal_5ff5dfa69da54.pdf
    • https://zenibevakuziva.weebly.com/uploads/1/3/0/7/130739170/jukujufogub-tozapu-pujis-vulekabu.pdf
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fd996947364a.pdf
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/c98015.pdf
    • https://cdn.sqhk.co/mowaxuso/hfghfjg/best_soccer_foot_skills_drills.pdf
    • https://cdn.sqhk.co/xuxinugad/crC52SG/novesisaxawog.pdf
    • http://topsalon.xyz/506668371984hhb4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc63.bin
ea352b6302b5b25047deb6ae32711f299761dac95003734f59b1719edd49de42
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC63 4888 bytes
font_01_sfnt_off0000dcff.bin
42bf09d1e7651d01576449485622dc5a12012496706383646b5ff564f69c4ab5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 10096 bytes