Malicious PDF — malware analysis report

Static analysis result for SHA-256 55354b2f92453132…

MALICIOUS

PDF

75.3 KB Created: 2021-03-09 00:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 068b1c2c0c796f347f95b7fb7080b391 SHA-1: e99c70f2c9d4a33fee0ad9b189ba002f20ea4f8e SHA-256: 55354b2f92453132cce1a81c3f1fa7bd774befef9875526357c98d1c02608bf2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that mimics a search result, likely intended to trick users into clicking it. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead users to malicious content, potentially a phishing page or a further download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=teach+yourself+c+pdf+online PDF link annotation
    • http://youralteragoods.com/kudisemebiwovs2jw.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/can_you_calibrate_an_infrared_thermometer.pdfIn PDF document text
    • http://digitalmicroteter.xyz/jusinenavajujotuwojis534.pdfIn PDF document text
    • http://braco.ru/isagenix_30_day_cleanse_schedule2mnbe.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/slow_motion_editorqa1mx.pdfIn PDF document text
    • http://hugertely.xyz/8051_assembly_language_programming_tutorialg3166.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/hx_stomp_patches.pdfIn PDF document text
    • http://gratoram.site/kenmore_elite_washer_service_manual0f8x0.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/47290694461vwdll.pdfIn PDF document text
    • http://kind-insta.site/79205706870kq1pg.pdfIn PDF document text
    • http://edayafar.xyz/dungeon_crusher_towertpgyr.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/sumesawoxajew/10515228723.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/86699439692.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/selva_amazonica_informacion_del_incendio.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/dosefusedanimemu.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/zotatipabibono.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/challenges_of_project_management_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/briggs_and_stratton_725ex_190cc_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/series_resonance_circuit_lab_report_conclusion.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/bihari_babu_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/viwegobimazitaxadekolesas.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/microscope_diagram_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/cute_babies_dance_videos.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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5296 bytes
SHA-256: 732241ccb03a17a27c05f9364ee1884b305de4eee86e39caf9c4dfa1968e7d0f
font_01_sfnt_off0000fc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC46 10368 bytes
SHA-256: 62248abe8e248464e6acf589433bf274cfcbe6118468866102a12d716ad8815e

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