Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a44c56c5aacde9…

MALICIOUS

PDF

72.5 KB Created: 2021-06-05 08:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5dd1bbfc10e46b019f4f9b6c3275664d SHA-1: 289a23a1ee7bd83faf306a8244e1cbcf0290bf4b SHA-256: 17a44c56c5aacde908ec87487d08fbe42d93dd47e2a86a10aa6585c91a0f690d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a URL that likely hosts a malicious payload, disguised as a download for a game mod. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://krisoc.ru/pbw?utm_term=garena+free+fire+mod+apk+unlimited+diamonds+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e1adba-e146-4d8c-8358-945abc843818/how_do_you_download_mods_for_gta_5_on_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793c6642-5ae3-419a-a595-f6908fa8c721/13562210835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3792519f-63a7-4a1c-9b85-9d33d716f054/does_the_us_have_paid_parental_leave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29db27de-8dd5-4eba-b1d1-ec03b014101c/kesaxagalix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be8747d-1ed4-42be-8a1e-06bb494a407a/powerful_prayers_in_the_bible.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/f/zawosubumipegatobuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6bd1bd0-fccc-423d-9ca7-c7cec7ccca3f/how_much_do_union_pipefitters_make_an_hour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5787b302-f153-4ea5-87e5-c85fccafa8be/tilitopedenejezozazojenem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1480c590-1ded-4ff3-a55f-de1a4fae20c2/65446073480.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/solving_multi_step_equations_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28c8ee6-2b98-4b1c-a552-1d903f6af725/gudizogivulaxopawozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2108565b-06e4-431c-8115-bdc9840e3793/how_much_do_interior_designers_make_in_austin_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8126d8-4b54-4ced-b2ef-4db0331784fc/32033460107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294ed6cc-e2a0-4f7c-9b45-9c80956006ff/new_moon_in_capricorn_2021_time_and_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c67f3ef-d0dd-4c3f-8181-88e25a1f01be/suxami.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/dovixafepedibexujatan.pdfIn PDF document text
    • http://vefubop.pbworks.com/w/file/fetch/144636840/how_to_assemble_manual_blood_pressure_monitor.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/144535491/aaru_paranju_pulival_kalyanam_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efbb4e8-adfa-4114-8208-d588abcc3b65/matematicas_financieras_que_es_capital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2735cf0b-6c09-4439-ad53-173e4a63ffcd/nonavisavotizof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddafcacc-150b-4869-98e8-d85b448d65e7/zorba_the_greek_cast.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_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 5376 bytes
SHA-256: 06f696dbb6aef05f60d17ee67784ac65d8142e74dd755792730008c9662dce5c
font_01_sfnt_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 10900 bytes
SHA-256: 61ded671dcd15b75082e56a9b941d122e990086529d41097d1a0fb4f8f18bef9

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