Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ec56537f590f7a…

MALICIOUS

PDF

81.6 KB Created: 2021-03-07 12:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fff2b0bc7fe15f79122244776ae940e0 SHA-1: 028b555e820e27609e555992dd96a3c38b8c1414 SHA-256: 38ec56537f590f7a73f8ee63f7ef4414c5c6aee21a3d51313031a21219e48534
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an external URI and the overall classification suggest the document is designed to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wix?keyword=ff6+esper+leveling+guide PDF link annotation
    • http://trynutra.shop/hp_pavilion_15_p051us_reviewdhlpv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fe7322b5b235.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/java_interview_preparationnz5lj.pdfIn PDF document text
    • https://janikopet.weebly.com/uploads/1/3/4/6/134690806/batag-xejeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_6016385ce8ee3.pdfIn PDF document text
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/9770924.pdfIn PDF document text
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/3719253.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/jh6mdIK/rikenitutosetowiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_60327ea731c65.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/xafikokove.pdfIn PDF document text
    • https://sexuviruzimi.weebly.com/uploads/1/3/2/8/132814305/kuxomuveniletobagav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_603f3c01c41a2.pdfIn PDF document text
    • http://domsale.xyz/6019583743343whg.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/qhiqheB/archer_cast_season_11_episode_7.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/261637137971xsv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mutirexa/fodiw.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/90441330735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8b04e3-40b0-497f-9171-aee2cceb57e9/98273692138.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/how_to_calculate_hours_worked_in_excel_with_lunch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a0cc563-7312-4b63-82af-bb54b1623f09/39990654295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071a3281-51cf-4268-94a5-6a70d51a911e/does_teeter_hang_ups_work_for_sciatica.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/19705266796.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/wireless_n_wifi_repeater_manual_em_portugues.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_off000103c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C0 5168 bytes
SHA-256: 4313f18ea1e38833e35717f6a8d2e31a1687a66684d5fe8438987f41c5b9a70e
font_01_sfnt_off0001157a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157A 10472 bytes
SHA-256: 332c323d2c63226176201e1f4e24d10a27126961bd19029f35dd13cb90bb7c1e

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