Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b1e0de5b5a9c91…

MALICIOUS

PDF

130.0 KB Created: 2021-04-27 05:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6dd6d9be0327ec1406f11ec3edf09b77 SHA-1: b0b3ee6b7066953c5dcf763d3fa940f4bea710f9 SHA-256: f8b1e0de5b5a9c9178cc2171dc9ba1c6b43b880662037981996a78266b286c79
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://nipisod.ru/strik?utm_term=fleck+5600sxt+programming+youtube PDF link annotation
    • http://macsk.space/non_functional_requirements_for_android_mobile_applications2lxpi.pdfIn PDF document text
    • http://boldly-grow.com/rhythm_city_18_september_2020_full_episode51yu2.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/nafamaragisek/vanefeti.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/82132860272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac45c0c9-2974-4931-b21f-7fdbec20135f/56404325408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e89fc735-f365-4081-9753-f9a9a2732d59/how_to_replace_drum_unit_brother_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/hillsborough_county_school_grade_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e9f333-72c2-4c52-adc0-a4f92e1e4915/power_pressure_cooker_xl_instruction_booklet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8644f920-e623-46e8-8e4d-9b7e19bcfa77/wd_my_cloud_home_duo_personal_cloud_storage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ffea0e-5ddb-48e8-aa62-8de03e5ae5c7/bixega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/666ecd8b-e349-4231-b24f-c6e5f98a8148/study_manual_for_soa_exam_mlc_life_contingencies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819d86e6-d8b2-481f-bbc0-1a61cd180acb/do_portable_ac_units_dehumidify.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17a2c46-4d7b-48e1-8961-ddae65fd0fa4/56812456281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6cb701-8f7b-4155-aed9-c51d1f89e340/fabewerubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1814e69f-5a1b-475c-b904-e936bfcb4bfe/56916984275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a757c41-107c-40fd-b60a-fb6125aa8cd3/pyramid_principle_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/folk_music_english_dance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52d7f61-56af-4bf7-8d8a-f36e9e609b47/c_sharp_tutorial_for_beginners.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBF8 6000 bytes
SHA-256: f4f1f7a1b71161f54626d01c6833fe70423fdcfc61bbd5dc5fc1c8b64c4d75b6
font_01_sfnt_off0001d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D063 11856 bytes
SHA-256: e7cab25513aa3d0185dfb3e1ff21b763a400e3657098fa61db2c64f679ceb440

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