Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20a62bf9a3fb816…

MALICIOUS

PDF

76.3 KB Created: 2021-04-17 05:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 972fd585e51cb26b8ec301bb6f4ed6c1 SHA-1: d86f5d1348d06a9c666b9460bf751a9fd2c57b3d SHA-256: b20a62bf9a3fb8168d3a5ea7f4603c7b3ca96c7eab8bf1f1839a5ccb08d25f54
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The document contains an embedded URL that leads to a suspicious domain, likely serving as a lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/strik?utm_term=how+to+graph+limits+with+infinity
    • http://ruwemaroxi.22web.org/21376486112.pdf
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fdf39b074211.pdf
    • https://static.s123-cdn-static.com/uploads/4476601/normal_5fdd2abb46f29.pdf
    • http://jezuxomanitabi.22web.org/japudifibofufomulakuwek.pdf
    • http://getyourscore.info/88562934441ap4ik.pdf
    • https://cdn-cms.f-static.net/uploads/4418985/normal_60647d72e5a8e.pdf
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5ff7cb57a7c68.pdf
    • http://bupro.asia/bhagavad_gita_paritranaya_sadhunam_meaning_in_hindim63zw.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://basiditdcf.space/59531408669iueh0.pdf
    • https://cdn-cms.f-static.net/uploads/4416504/normal_600c672244d7e.pdf
    • http://sawumivulopajud.22web.org/74959454946.pdf
    • http://help-bluebadgecustomer.com/jijexeboxubojtzao.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lekizopiloref/bugupenolajev.pdf
    • https://uploads.strikinglycdn.com/files/92078578-4bc3-4108-aba9-ffb5fabdcace/3032074744.pdf
    • http://biwewija.rf.gd/noduvepokafa.pdf
    • https://s3.amazonaws.com/forupokisip/29095428074.pdf
    • https://s3.amazonaws.com/midaguvimabof/importance_of_text_structure_in_academic_writing.pdf
    • http://vuruketunuwu.epizy.com/bank_of_baroda_atm_card_application_form.pdf
    • https://uploads.strikinglycdn.com/files/ab0aa07e-1d2e-46f7-aaeb-690d2eb3a506/lenovo_thinkcentre_m82_tower_motherboard.pdf
    • https://uploads.strikinglycdn.com/files/3df3e878-2af2-47db-8035-2c365196997b/82353732537.pdf
    • https://s3.amazonaws.com/pidufozu/secrets_of_the_baby_whisperer_summary.pdf
    • https://uploads.strikinglycdn.com/files/0db78b78-583e-46e6-9e85-664d795ceb8a/1998164126.pdf
    • https://s3.amazonaws.com/pomaxa/mla_format_website_citation_in_essay.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/google_chrome_latest_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/ea38f22c-6247-45c2-953e-a654c22db974/what_you_thinking_quotes.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_off0000ea28.bin
3c92abca9941685a9bb74edf4c79b1a11f5493fcf65e443c57099dd597c0113f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 5468 bytes
font_01_sfnt_off0000fcb7.bin
ff60170ff7b8ba8aaf32cd6293c22ba0b889e04b6c35e5cc7d63f9c36e5def73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 11408 bytes

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