Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2a2b6b664c2b42…

MALICIOUS

PDF

79.6 KB Created: 2021-05-15 03:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 82739238ba289b4a2f18ee69abfeeb89 SHA-1: 539bc330cc985d82becef1eb8aa8a307b97fa30a SHA-256: 4c2a2b6b664c2b4229c1c215a03159151fd062ee99d95bf2282ade5e64b8ed50
154 Risk Score

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 routes users through malicious redirector infrastructure. 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=1.+sebasti%25C3%25A1n+no+es+vegetariano.+l%25C3%25B3gico+il%25C3%25B3gico In PDF document text
    • http://pumujavebedopa.iblogger.org/schooled_full_book.pdfIn PDF document text
    • http://smallita.space/367652351523uu5s.pdfIn PDF document text
    • https://cdn.sqhk.co/widobixi/jchiigU/75448173573.pdfIn PDF document text
    • http://takipleskazan.org/25087820726vol3h.pdfIn PDF document text
    • http://mestorating.ru/class_3_math_workbook3tocw.pdfIn PDF document text
    • http://tokio-2020.fun/dupenepolubojon3hxf.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/oOoDig8/41259633698.pdfIn PDF document text
    • http://italia-doc.fun/gatoburogugafonulugogana4qyp5.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/cvjfeia/pirate_attack_water_table_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/YUkjagc/god_deck_mtg_arena.pdfIn PDF document text
    • http://fortuneo.biz/pelepusowadexomirolibrssu1.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/36c0o7u/47893837708.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/liluvad/satoxur.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/new_call_of_duty_update_ps4.pdfIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_98c5d96499fd4bfe96635685e7d6fb4d.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_131fc42914a342f8a9c1ab1df3be6b66.pdf?index=trueIn PDF document text
    • http://kewugozosefo.epizy.com/mitofarijogixubaridun.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/wadujikal.pdfIn PDF document text
    • http://nozovov.rf.gd/pdf_accessibility_checker_3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/26946229563.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/descargar_cymera_apk_para_android.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_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 5524 bytes
SHA-256: 8bd6d9ff891292e64f120817a971dae96b1c99908ec3d21abbacaa02310c81f3
font_01_sfnt_off0001041a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041A 13904 bytes
SHA-256: 4905d3880691e851f9f4530b069c1ea1e1cdf53d6f7aedf5c6f4dd58c5e0ce2a

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