Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5711d801901e2c…

MALICIOUS

PDF

101.0 KB Created: 2021-03-28 17:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9145a2c353e707e2153d92517750a66 SHA-1: 2f3ea1ac30fef99ee7c40e19c15a0f1d6cdd2055 SHA-256: eb5711d801901e2c8feaf6f5184765b56d08cac46245ab800d11521be0c2fde8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that leads to a domain associated with malicious activity, likely serving as a lure for the user to click. The document body, though heavily obfuscated, appears to be a deceptive query related to medical information to mask the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=what+is+the+icd+10+code+for+head+trauma
    • http://vozivovog.scienceontheweb.net/64196736148.pdf
    • http://finuxezanasa.mygamesonline.org/93369017960.pdf
    • http://xukuvapama.iblogger.org/kalexumosisugekojurijiw.pdf
    • http://wuramegojuluz.mywebcommunity.org/construction_safety_manager_salary_california.pdf
    • https://cdn.sqhk.co/posojuvapono/hjjhwij/polly_pocket_car_racing.pdf
    • https://cdn.sqhk.co/xonipavu/fHAIgfj/nowize.pdf
    • http://kubosikavudux.mygamesonline.org/jetoxozunixapokonu.pdf
    • https://cdn.sqhk.co/vivakawibaki/hiiijgf/mowavozixupiguki.pdf
    • http://jorowijedo.mywebcommunity.org/how_to_reverse_a_hunter_fan_with_remote.pdf
    • https://cdn.sqhk.co/dibitarebizu/ii5haoB/cara_cheat_plants_vs_zombie_2_unlimited_sun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zanulewetadom.epizy.com/does_logitech_k400_work_with_samsung_smart_tv.pdf
    • http://ruriwujuvuwa.epizy.com/gedenagokovomojebumawa.pdf
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_6167950f90104233a9b68f85db056913.pdf?index=true
    • http://sojufuka.atwebpages.com/33599727601.pdf
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_f4790eef8eb847c78866e69abca9d998.pdf?index=true
    • http://pajiridi.rf.gd/are_maytag_washers_still_reliable.pdf
    • http://ninovaxabax.epizy.com/cooks_essentials_pressure_cooker_issues.pdf
    • http://sijurajogo.epizy.com/nomofogegomojaromuzelulig.pdf
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_4c7d61f51261463bb9dbfc70b6830149.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001413a.bin
a4750377c905bd7cabace1925a3a9e1001e3ff07d3c353af183f1ca86996b9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1413A 5212 bytes
font_01_sfnt_off000152fd.bin
ecfcde92330d31ff185802803be3baf9037dd7c95eef4c8eb50fa61cc3b1377e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152FD 10656 bytes
font_02_sfnt_off00017794.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17794 4324 bytes

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