Malicious PDF — malware analysis report

Static analysis result for SHA-256 174855dc1b9bddd0…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 03:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 74defbe273f378bdc62cbf1443ffc042 SHA-1: 1e574d7cfa5ad8bb2788cc780966d9797da4d7bf SHA-256: 174855dc1b9bddd041e397781978e655ee52f8069691a55639811d2db875bdb0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'boutique hotel definition'. No scripts were extracted, but the presence of external URIs and the malware detection strongly indicate a malicious intent to redirect users to a compromised site.

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://baarspo.ru/award?keyword=boutique+hotel+definition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd67102b34f5.pdfIn PDF document text
    • https://cdn.sqhk.co/nivabetaz/gh4Zvha/jsw_roofing_sheet_specification.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ichbgfZ/jeredogowul.pdfIn PDF document text
    • http://kutakelipaxeb.22web.org/jivibesemuvopo.pdfIn PDF document text
    • https://cdn.sqhk.co/zixifazod/GSiigeB/walajuxinotonobigojinuzed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376621/normal_60075a301400b.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/punagilelabon/76177813852.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/cadillacs_and_dinosaurs_apk_for_iphone.pdfIn PDF document text
    • http://lobaman.epizy.com/jewekuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62785b67-8b8e-4fc1-a8a1-faa75f338628/nelulazonosobamevevibev.pdfIn PDF document text
    • http://vilewol.epizy.com/approaches_and_methods_of_teaching_english.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/email_template_to_inquiry_about_a_job.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/where_is_the_wps_button_on_my_arris_router_tg3452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f614bc52-7283-456a-9eb4-47facc4560a8/54462668113.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/vertebrate_zoology_lab_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/xoxefolimifolipavek.pdfIn PDF document text
    • http://zaxifopusuviz.epizy.com/noromibego.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/14007897629.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/burger_king_coupons_jan_2021.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_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 4820 bytes
SHA-256: 03dd299b4b8252976619cf542d2badad9976d1ca221946516e3c93ae5b7b059c
font_01_sfnt_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 11416 bytes
SHA-256: b6ac05c8a5be4d3fa59255ceff8cce225839cd8d5e16f1e59bd8f2da21dad411

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