Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb716fd97ee60ad3…

MALICIOUS

PDF

78.1 KB Created: 2021-04-04 20:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5255a254031a218fb014e3796d72d5d3 SHA-1: d681eb0433ba5ae0fbc76a90ddb35b68ba4ad720 SHA-256: eb716fd97ee60ad3a667cb7434209707f2407277415dc04f273485584db2f7b4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics, including a critical ClamAV detection and a high ML score, indicating malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=able2extract+pdf+to+autocad', which is likely a phishing or malware distribution URL. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into navigating to a malicious site, aligning with spearphishing tactics.

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://golowaki.ru/123?utm_term=able2extract+pdf+to+autocad
    • http://daliadiago.com/ruwuniwuranugadiniwaw3yop.pdf
    • https://cdn.sqhk.co/dojopaxitovi/PYeD5je/super_dancer_chapter_5_audition.pdf
    • https://cdn.sqhk.co/foropogajag/YjcUJsr/simple_electric_circuit_diagram_symbols.pdf
    • http://clobuss.ru/jacplus_worksheet_answersvf0yv.pdf
    • https://cdn.sqhk.co/fumazuri/58hjjhi/27232612506.pdf
    • http://talakam.space/matilda_musical_script_freexjyz3.pdf
    • http://cardio-active.site/bifoparotesotanas9rz8j.pdf
    • http://familyit.info/wikaxisugetisik419qj.pdf
    • http://urolog.xyz/michael_talbot_holographic_universe_youtubeo1gt6.pdf
    • http://bazis-rostov.com/tetesakepomewsm21q.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/add44870-aeb2-4af6-a45d-9ff5a08e2d1b/cat_cj3000_battery_charger.pdf
    • https://s3.amazonaws.com/tapelu/antivirus_for_pc_free_windows_8._1.pdf
    • https://uploads.strikinglycdn.com/files/786a8def-eb52-4bd2-9ef5-eb153433cdd3/zojewufuwolosexefejivuzil.pdf
    • https://uploads.strikinglycdn.com/files/6b381c92-2512-4909-9dc8-93e7f270251d/how_to_rate_language_skills_in_resume.pdf
    • https://uploads.strikinglycdn.com/files/6d78dc87-b373-46d2-8bd2-c21bef9b7033/what_is_share_market_in_telugu.pdf
    • https://s3.amazonaws.com/daniwodug/83942946123.pdf
    • https://s3.amazonaws.com/wujodibu/70207889829.pdf
    • https://s3.amazonaws.com/ronenitevodo/97034343610.pdf
    • https://s3.amazonaws.com/loxopudizus/self_reliance_meaning_in_english.pdf
    • 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_off0000e6b1.bin
42a61ea69571cde88e92a742579ff2b9b540be4fcb3a5b7eafab6fa4e8ad9f82
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 5300 bytes
font_01_sfnt_off0000f8cc.bin
f79b44124f2be56067abf9605bddc1317e0a7596045b9af764c9143615e4587b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 22176 bytes