Malicious PDF — malware analysis report

Static analysis result for SHA-256 289ecdcb9fc1748c…

MALICIOUS

PDF

71.0 KB Created: 2021-03-04 18:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 08757f85a23d913e536ec401a5fc1128 SHA-1: 27edc2f1d956d93ab22adb9d0f2c9b9c2083ea9a SHA-256: 289ecdcb9fc1748cf4de300fb9a67f8f14c3d2297e0afdd64a4e9316abd9f8ff
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of a malicious URL and the document's likely purpose of luring users to it points towards a phishing attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=best+mutual+funds+for+2020+us In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_602b63f53d51b.pdfIn PDF document text
    • http://hydra.moscow/541597061884nr2u.pdfIn PDF document text
    • http://lasleymarkt.ru/quote_from_ram_dass8vuq0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_600e52c1d8e5a.pdfIn PDF document text
    • http://virnet77.ru/ta_fidelite_est_grandee91op.pdfIn PDF document text
    • http://pinerapidsrr.com/zinosefebiwips0vvm.pdfIn PDF document text
    • http://sodalabs.club/82438529409kunqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_601d07ccc9f80.pdfIn PDF document text
    • http://adminhalil.com/feluniganorl7ng0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_6001d42a2bbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_60403294da5e0.pdfIn PDF document text
    • http://lenudes.com/mayday_movie_parents_guidevjdzp.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/jusagi/xuserovexur.pdfIn PDF document text
    • http://wozojatoxako.epizy.com/44670179200.pdfIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_9d696484d1a84bf7a5faeaaabed0bf86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/where_to_buy_snapper_mowers.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/auto_voice_call_recorder_free.pdfIn PDF document text
    • http://bifepibapunufav.rf.gd/honda_fit_2007_mpg.pdfIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_0f070adc67b345fe8e2120a7b39090e1.pdf?index=trueIn PDF document text
    • http://supabije.rf.gd/health_canada_gmp_inspection_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/office_calculator_pro_mod_apk.pdfIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_406bf16949474b84b7970b2828f72685.pdf?index=trueIn 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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 5376 bytes
SHA-256: 09dd77d662e2239b77d49c21316800ff7f9b9cf57a338a01a36a12bc3c4c5416
font_01_sfnt_off0000ebf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 10212 bytes
SHA-256: 335d3bd610646950613a31dd714d5527856055c122a11b7ad54ad9a37950a822

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