Malicious PDF — malware analysis report

Static analysis result for SHA-256 778d5a91a8014b92…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 11:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2792004ec8e8abd835aa8efd9c204513 SHA-1: 96ecf0cb49d6860f73f08db301278d06ca6dad87 SHA-256: 778d5a91a8014b922f1c75689a7a30c1f00eea36772e4d6a528ad6758701db39
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 0.9997

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://maypoin.ru/strik?utm_term=what+does+it+mean+to+question+a+text PDF link annotation
    • http://zunewibozoxug.iblogger.org/78320846352.pdfIn PDF document text
    • http://ruxiroxawem.22web.org/atlas_of_mri_brain_anatomy.pdfIn PDF document text
    • http://wumofuzusagumo.22web.org/tokyo_ghoul_anime_age_rating.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/nolarifaforuxop/thyroid_body_type_diet.pdfIn PDF document text
    • http://dimogotewebi.epizy.com/behavioral_skills_training.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/82544162378.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/54075785227.pdfIn PDF document text
    • http://jebefufodapiwi.epizy.com/dafajezidarevesazojufig.pdfIn PDF document text
    • http://lesuzikabe.epizy.com/borneras_electricas.pdfIn PDF document text
    • http://jolivawojo.rf.gd/dka_guidelines_ispad.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/mini_lapbook_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/entamoeba_histolytica_treatment_guidelines.pdfIn PDF document text
    • http://petizitopebil.epizy.com/asus_rog_crosshair_viii_hero_wi-fi_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/call_using_internet_android.pdfIn PDF document text
    • http://nafevozow.rf.gd/letter_word_sentence_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/asme_pump_standards.pdfIn PDF document text
    • http://wodasakuzetu.rf.gd/android_studio_run_shortcut_mac.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5144 bytes
SHA-256: 97c3126638a2749e7fcdffcb66018377123791d80678284c710feaa3dfc4f1a5
font_01_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 10656 bytes
SHA-256: 6d76a4f2b3396a0e73dc8b0e314bde6a0856d7da92b09f588135192d0cf6d1fd