Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7c268c78ec080b…

MALICIOUS

PDF

73.9 KB Created: 2021-04-07 01:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0e644fda7bf9964582cba3388167f83 SHA-1: 865cc949671182fd5c21802c6fe5cbbc3efe5e73 SHA-256: ac7c268c78ec080beb740781dd67ad8459d3f9dbff8cf01d4694b3015734114c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a URL which likely hosts a malicious payload. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to PDF files and authoring tools, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=the+blue+nile+alan+moorehead+pdf
    • http://fidumanodabimor.22web.org/77969073782.pdf
    • http://ruzoboxilotazex.22web.org/what_does_the_ending_of_the_killing_joke_mean.pdf
    • http://vosiwikaxipe.22web.org/mirrors_of_time_brian_weiss.pdf
    • https://cdn.sqhk.co/xiladuxe/jFgejgK/run_3_unblocked_cool_addicting_math_games.pdf
    • http://letnesil.xyz/24939802442dnxak.pdf
    • https://cdn.sqhk.co/vizinifum/hbSiSjb/27805914596.pdf
    • http://micrometer25bill.site/61305385817cx5as.pdf
    • http://rawenspant.online/what_are_the_7_basic_life_skills81m3o.pdf
    • http://tryraisins.club/love_and_respect_workbook_questionsrw4pt.pdf
    • http://juligum.22web.org/jojalolefonilaseberu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zagapaxa/1418638059.pdf
    • http://nofugodevi.rf.gd/rosipexa.pdf
    • https://s3.amazonaws.com/fifomi/womutigiwatesomumaxixo.pdf
    • https://uploads.strikinglycdn.com/files/3b327b77-2046-4ccb-be93-40aeaa6066f9/44364799856.pdf
    • http://lajimaju.epizy.com/galoj.pdf
    • https://s3.amazonaws.com/vatosolikijike/sivukedowabemuwudutudo.pdf
    • https://s3.amazonaws.com/pubopelej/nowodowo.pdf
    • https://s3.amazonaws.com/gorajikunobixi/l_thuyt_reported_speech_with_gerund.pdf
    • https://uploads.strikinglycdn.com/files/1d00c786-ede3-4b97-88f3-b3b3acc81be3/celf_4_scaled_scores.pdf
    • https://uploads.strikinglycdn.com/files/9a7d2f3a-c8a8-4310-a891-38fa09628f1f/nodamobi.pdf
    • http://jugututinotu.rf.gd/persona_3_chihiro_social_link_guide.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_off0000e41c.bin
25aaf0cfa3eab84dcead137a1059dc1ff46a091e88b38e06c2715d0a3bb83d85
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 5192 bytes
font_01_sfnt_off0000f591.bin
94d91bdea1e4f01004de9dbfd0b1f1d2894f187771546b6b25d5f7cc87b4d08b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 10900 bytes