Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de922de9e1521b3…

MALICIOUS

PDF

75.3 KB Created: 2021-04-08 03:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ad3ef579015a8a40d7342c230396f5 SHA-1: 2d9a80952634f2f62d1871c62c0d16602258c918 SHA-256: 5de922de9e1521b3e87135343571ffb80020586446ff227fe3e5c144f381df4e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it is used to deliver a malicious payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI strongly suggest an attempt to exploit the user or 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://jumiwimov.ru/123?utm_term=tears+in+eyes+images+with+quotes
    • http://rivozuzeno.mywebcommunity.org/cerita_pendek_anak_bergambar.pdf
    • http://kamikofonem.mygamesonline.org/warriners_english_grammar_and_composition_fourth_course.pdf
    • https://cdn.sqhk.co/zevijevam/FgjGLij/74549124374.pdf
    • http://gozipoxeget.iblogger.org/jefume.pdf
    • http://fuvagezilavez.mygamesonline.org/mf_35_x_starter.pdf
    • https://cdn.sqhk.co/kunimanujage/ijebshd/66454650863.pdf
    • http://reduslim-italia.website/pokivubodifapowuwiwezizaftu01i.pdf
    • https://cdn.sqhk.co/lagusive/jjRhijj/ps_survivor_space_99_tomcat.pdf
    • http://zabafijazone.iblogger.org/2594947087.pdf
    • http://zozamowewideno.mypressonline.com/sinovoga.pdf
    • https://cdn.sqhk.co/jevamivuvugi/ULgchdu/online_quran_teaching_jobs_in_canada_2017.pdf
    • http://sidodawoleze.iblogger.org/billie_eilish_lovely_sheet_music.pdf
    • http://fonujameritules.getenjoyment.net/tiripaburulej.pdf
    • http://registrat.space/what_does_it_mean_when_your_dryer_doesnt_spine6r0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pokogasojogev.epizy.com/bsc_agriculture_5th_semester_syllabus.pdf
    • http://fakuzilezozo.epizy.com/hyderabad_weather_report_please.pdf
    • https://uploads.strikinglycdn.com/files/388c1a8a-9dfb-487b-bb4b-5550b60c6142/61324303915.pdf
    • http://bajupigirosinaf.atwebpages.com/kuzemivutijamizaxef.pdf
    • http://wenares.myartsonline.com/types_of_cognitive_biases.pdf
    • https://uploads.strikinglycdn.com/files/fa778114-e44e-457b-87ac-7f4609f9367d/33200332821.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_off0000e966.bin
97ccd57b6fe4e90d082cfe187a92f768d6245025752c9cb5ae4760b6ac9f664e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 5336 bytes
font_01_sfnt_off0000fb76.bin
122e34963917ea00de82f6a9fd31bf66efd1f2d5963340a29a39f73859f81dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB76 10716 bytes