Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37f165e8695bd22…

MALICIOUS

PDF

82.6 KB Created: 2021-03-24 14:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 425d7b64ebd936216c86ef3964f7cea0 SHA-1: 8f8ea11497efc9c8a876e28296817adb6e20b962 SHA-256: b37f165e8695bd2284d3eefe402918618e1f8e6de4df665c15f6339c07273988
136 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI and a lure for a password-protected archive. The embedded URL, https://maypoin.ru/strik?utm_term=polaroid+tablet+factory+reset+button, is the primary indicator of a potential phishing or malware delivery attempt. The document body's corrupted state prevents a more detailed analysis of its specific content, but the overall indicators point to a malicious PDF designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/strik?utm_term=polaroid+tablet+factory+reset+button PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423136/normal_605a798b465f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_5fe482ae4b15c.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/8Zikghd/dimevevejitalujawi.pdfIn PDF document text
    • http://momenujobig.22web.org/welezotakinufapivazowit.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/hdzhcgi/dictator_2012_all_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_604a88853cc5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubogijogazerew.epizy.com/game_bloody_roar_ps1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8147e60-b5bf-48a5-a2dd-6442be4147c9/warerudokunu.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/xoloxaxazupo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/tnpsc_departmental_exam_may_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/como_fazer_convite_de_aniversrio_pela_internet.pdfIn PDF document text
    • http://loratozojakin.epizy.com/lafutobedot.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/head_first_javascript_programming_-_oreilly_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ad1697-a37e-4f0d-b8c6-d66dbaf7fbed/irony_in_harrison_bergeron_worksheet.pdfIn PDF document text
    • http://fujexadegog.rf.gd/pizukasevawodana.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/leditazim.pdfIn PDF document text
    • http://puxirozenudut.rf.gd/46119530264.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/subolaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/71781867548.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/mejijisodirafo.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/velotakukaboxepexavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ca30e0-b470-438d-88d1-e8c04b4495e2/frases_del_principito_hacia_la_rosa.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/ejemplos_de_proyecto_de_investigacin_cientfica_sobre_el_medio_ambiente.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 5256 bytes
SHA-256: 64cc57c4a07a55811bb7cf6a9ff1c1ba9422c128845669a9b877325d9481a0da
font_01_sfnt_off0001182c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182C 10956 bytes
SHA-256: dd8350550e2d8142e440a7173685522934f96275a056363897164609d4abb313

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