Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcfcba9c40f9f63…

MALICIOUS

PDF

82.8 KB Created: 2021-03-12 12:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 90701d4e453190e28b20f068103c1e11 SHA-1: 9b3ace35ce5326f60e426f8249571c03ce168beb SHA-256: 6bcfcba9c40f9f63ca8e831c4e8aa43d80202d9894a01b27d389e01e27ce66b4
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 0.9996

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/award?keyword=allianz+travel+insurance+claim+form+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373522/normal_600fa7854e356.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388276/normal_5ff860e88cf2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476569/normal_5fe90ff4218a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/firigugixujotov/subik.pdfIn PDF document text
    • http://gizogebinide.rf.gd/gitlab_ci_template_c.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/64360061017.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/all_50_states_in_alphabetical_order_with_abbreviations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd2153d-a7ba-45fe-bcf3-4e39ccc309ff/wibedokafazuwowudimipura.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/28060584392.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/dagodumunugaboratewenof.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/86804175020.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/reformas_borbonicas_consecuencias_positivas_y_negativas.pdfIn PDF document text
    • http://zexeborora.rf.gd/what_is_a_calling_card_used_for.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/30478037927.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/math_worksheets_3rd_grade_fractions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de0f4db-24e6-4784-9323-172aeb46c641/what_are_the_monetary_policy_tools_of_the_fed.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/12371840870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce8826c-ee26-4b01-87df-6a5bed6fa6d2/56001584825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182292d0-2dc6-4ff5-aab0-accfc684f697/the_displaced_person_flannery_oconnor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e1dff3-2ca4-45df-8276-023a1cfd740a/zapejogokukobaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/98373763557.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
font_00_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 5284 bytes
SHA-256: ef7ab9598a5455a3162cb123fb53c941380b369e6a7b97a622cbda3d17c3fc80
font_01_sfnt_off000109fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FB 10900 bytes
SHA-256: 03260f086db4b85c1b040e242059c7f76ccc26669e493a3252e3f8822e03855a
font_02_sfnt_off00012f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F45 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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