Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0836260d062d91…

MALICIOUS

PDF

83.6 KB Created: 2021-04-04 19:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 885651d3d60c99051500988c8e96fd52 SHA-1: b1992eb148170f9746b92f02d642809c5174064d SHA-256: 0a0836260d062d91973db6c858adf1b56967d841e7c2dba27eae6f48a8c10805
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/award?keyword=grammar+activities+for+esl+students+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392853/normal_604a5e4f1c906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_60405dd3b454c.pdfIn PDF document text
    • http://wajoxur.22web.org/blended_words_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xewiliwilax/gXH78NM/venezuela_socialist_dictatorship.pdfIn PDF document text
    • https://cdn.sqhk.co/rafopaluko/e6jcVia/ninja_fighter_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/3bjj0gj/octopus_garden_hendersonville_rd.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/14752444973.pdfIn PDF document text
    • http://xutiwavu.iblogger.org/john_maxwell_books_on_leadership.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_602e04b560660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_604460b98bb1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fukepez/93150107665.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/35653667143.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/77910142346.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/nokidedewo.pdfIn PDF document text
    • http://wokoziguroron.rf.gd/12916860398.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/sefoduwelafuwof.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/99012254022.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_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 5392 bytes
SHA-256: 65a4e578f7f9ac68b7121a8fb347f63fc2634680f9ee2db446d3282aac6a6a17
font_01_sfnt_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 11412 bytes
SHA-256: 1550a7df5a25d5e44149bf500efd301f75b17669b18d2d5057dacb8d4fcc4517