Malicious PDF — malware analysis report

Static analysis result for SHA-256 4484d41c273dcf85…

MALICIOUS

PDF

77.8 KB Created: 2021-03-29 15:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98eca0fc97aea9c6d4d3cab9e2f173a2 SHA-1: b9e4ffc7090859d3ba1b25268d601cf86a237c3c SHA-256: 4484d41c273dcf85aeb611e5c5907341e96d09efdaf21649948e52b9ce42e403
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, suggesting an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection indicate a phishing or malware distribution attempt.

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://botokaw.ru/strik?utm_term=what+is+common+noun+pdf
    • https://cdn-cms.f-static.net/uploads/4494451/normal_605152600d1b9.pdf
    • http://sunufosabupes.scienceontheweb.net/tinuxedejazuzumud.pdf
    • http://favovuzoxegavix.22web.org/34086968181.pdf
    • http://nusowutevu.getenjoyment.net/edgar_allan_poe_o_corvo_livro.pdf
    • https://cdn-cms.f-static.net/uploads/4420434/normal_603578e63a0d1.pdf
    • http://xokezuwadem.mygamesonline.org/books_about_vietnam_war.pdf
    • http://vawadofofasip.getenjoyment.net/18613155484.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_8d237dddd5b24d9495a22508cdb05e10.pdf?index=true
    • https://s3.amazonaws.com/mogipegi/tabisag.pdf
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_3089b3e11ec049ba994a8dd8a101ac58.pdf?index=true
    • http://patenat.epizy.com/proform_cardio_hiit_machine.pdf
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_e447f5548840424dab33912932d02601.pdf?index=true
    • http://xonesopidazuju.epizy.com/94339505173.pdf
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_ae9ccd4544a846d6921774c6adf921b6.pdf?index=true
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_a2edb93e2c5543f9971a144524477ef4.pdf?index=true
    • https://s3.amazonaws.com/mafavuzenoliki/social_psychology_is_the_scientific_study_of_how_a_persons_behavior_thoughts.pdf
    • http://rojavig.epizy.com/beginners_guide_to_investing.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_off0000e8a6.bin
55d750086d430e87c5103d197111781e36aa8032b77d7d5a6f427dd72e5266e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 5280 bytes
font_01_sfnt_off0000fa8a.bin
e59858b54cad98f1772b4325a3f44c61672dffcdeab8895c57778f9566a12bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 14440 bytes

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