Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a41dfdb34359079…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 19:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5271126ab1b928b37aee521bf39de5a SHA-1: b0061bb45f3529d3966d0235f65da6da497b5627 SHA-256: 0a41dfdb34359079b1c06cc501ebef7997f4816a876442d46e7848522d0a95da
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to medical information to trick the user into interacting with the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=control+de+signos+vitales+en+pediatria
    • http://lolafoduluj.22web.org/75510532704.pdf
    • http://rijupoxog.22web.org/alien_vs_predator_arcade_free.pdf
    • http://talakam.space/boolean_algebra_quizzllvr.pdf
    • https://fivarebaxuru.weebly.com/uploads/1/3/5/3/135326201/5947382.pdf
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/9668278.pdf
    • http://selectgetc.top/argumentation_and_debate_13th_editionmk149.pdf
    • http://studyweb.site/forge_of_empire_hacksjgtxv.pdf
    • http://mademupo.22web.org/28114226788.pdf
    • http://begdas.fun/88583141506k87x.pdf
    • http://remont-kvartir-otzyvy.moscow/screamin_eagle_street_performance_tuner_softwarepikdv.pdf
    • http://viwaginuf.iblogger.org/noderategimovimeso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://josusasufuni.epizy.com/grade_3_fractions_worksheets_free.pdf
    • http://nawonuzegajosi.epizy.com/77833186388.pdf
    • https://s3.amazonaws.com/vapite/saudi_arabia_business_visa_application_form_australia.pdf
    • http://lunodemexixape.epizy.com/pivafirukesenazes.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_off0000e7d0.bin
1ed948b42b648efc5d93530b5126a88ce61a551d472b806fa9a4d0ce1a697d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5092 bytes
font_01_sfnt_off0000f92f.bin
214585051b6ccde0fe132dc814b39313e84aab784298edc729b4761ac4c80554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92F 11392 bytes

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