Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f4261493dca865…

MALICIOUS

PDF

179.0 KB Created: 2021-05-10 23:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 541628aa8175d175f14df74a7457abad SHA-1: 72a899d4a2faf715ed2562985cd65136d5f582c7 SHA-256: 19f4261493dca865d364eae42d6e07767c6ebec2d6bbdd202423cfda1bc98bc3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://seumenha.ru/strik?utm_term=shimano+ultegra+di2+r8050+ss+vs+shimano+ultegra+r8000+ss PDF link annotation
    • http://ecoterritory.store/equations_of_motion_kinematicscfen9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_6033456782905.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5fd1bc04e6038.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/511671798.pdfIn PDF document text
    • http://mimisijuz.mypressonline.com/bicep_tendonitis_exercises.pdfIn PDF document text
    • http://natbeach.space/89155104336s8zdq.pdfIn PDF document text
    • http://lighterusb24.site/94917445702svi3a.pdfIn PDF document text
    • http://kind-insta.site/firirisogunomogoxegolenw52.pdfIn PDF document text
    • http://teren.fun/acdsee_3._0_old_version_freeebo75.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/how_to_recharge_car_battery_with_charger.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/lovixusib.pdfIn PDF document text
    • http://o-karte-kopilka.com/2070414121agzu8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_5fd329b7c7ab1.pdfIn PDF document text
    • http://piredvizhnik.com/contoh_report_text_global_warmingopj3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73ae229-ee29-4750-8729-df6085e2c964/pumowaresogodi.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/nombres_de_nios_que_estan_en_la_biblia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f649f8e7-96d8-4802-bceb-168159e089a4/71643696998.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/who_makes_intertherm_water_heaters.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/business_ethics_case_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/android_aosp_keyboard_vs_gboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b5bb33-8ad6-435f-b002-c403cba240f8/nulodebasurizox.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/greek_alphabet_code_cracker_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/platform_bed_frame_for_headboard_and_footboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dab4361-1923-4ca4-9b3a-1777bde6fa84/tuvizekirenapid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ffb6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFFB6 131540 bytes
SHA-256: 41103af143761e1afdf465ceb14167c6b3be75cdab927f55d86b0293ce37c27a
font_01_sfnt_off000282c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282C7 5992 bytes
SHA-256: cc64987ecfb472b81a7a8ee0f5213aed7adcfbc6a3fb9c54064d37e8a1209c17
font_02_sfnt_off000296fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x296FC 10400 bytes
SHA-256: e072eb23f889f60374440e78b2d302a557a0ae3cb403a63d8823b30a7c426136

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