Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be8b2ebb72804a5…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 21:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223860f7a1d4dd70352aab0057f491f4 SHA-1: 9dec6a1fef2e9533d1dd6342352b7226bd119cde SHA-256: 8be8b2ebb72804a5a0c27eaba35e805eb6652624992966981692bc04a10baff6
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL that appears to be a lure for downloading a malicious payload, disguised as a partnership agreement. The presence of PDF_URI and EMBEDDED_URL heuristics, along with the ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION firings, strongly suggests a phishing or malware distribution 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://midufefew.ru/award?keyword=joint+venture+partnership+agreement+pdf
    • https://cdn.sqhk.co/rotuzuwibi/gfojbic/argentina_football_player.pdf
    • http://funusiwevig.22web.org/giduxonemus.pdf
    • http://nazikako.22web.org/album_song_hip_hop_tamil.pdf
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fd2723e4d540.pdf
    • http://raruranakadup.iblogger.org/informal_email_writing_for_class_8.pdf
    • https://cdn.sqhk.co/fejisedetu/KijaZgg/nhl_schedule_playoffs_tv.pdf
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5fda36d9225c1.pdf
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/6a44f203.pdf
    • https://cdn-cms.f-static.net/uploads/4450039/normal_600f11b7ad3af.pdf
    • https://cdn.sqhk.co/dugixikisim/hvEv1ZJ/selade.pdf
    • https://lepafelazaxi.weebly.com/uploads/1/3/1/1/131164007/0c679f338cd.pdf
    • https://cdn-cms.f-static.net/uploads/4375518/normal_601f5b1f0ea5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_c9610f4c050f457cbe7f48736bba9aeb.pdf?index=true
    • http://wudotope.rf.gd/selective_perception.pdf
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_2abdefe1cc474edf83510bddb6f60199.pdf?index=true
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_696dfb982168461980c9636a7493ebbe.pdf?index=true
    • http://pitowurojagit.epizy.com/65089609826.pdf
    • http://tiwomabot.rf.gd/tizafagabebavug.pdf
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_731368b511684ab08a88d3dc4033420a.pdf?index=true
    • 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_off0000e68e.bin
b7f563b6465da477b9d6db41c754355285b745f451df065013dcf2beddbe2d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 5472 bytes
font_01_sfnt_off0000f907.bin
8a07c4cf0687ed712b78ce0f8f821191f0e20e2f4547b9b70b81a98a44d32766
pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10372 bytes