Malicious PDF — malware analysis report

Static analysis result for SHA-256 92759316eb37d414…

MALICIOUS

PDF

67.2 KB Created: 2021-03-10 20:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1a215ddb36e0b5b2fa0025c73c56722 SHA-1: 23a03d559bf503f9f21054a199183b8ca323dca3 SHA-256: 92759316eb37d4148ae16f23ddbad39205f6ce36e41b477e72f6ef3d095102e1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to contain metadata related to its creation, but the primary malicious intent is derived from the embedded URL, suggesting a phishing or credential harvesting 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://vilenefex.ru/123?utm_term=best+anti+aging+face+sheet+mask
    • http://rebituzugofebo.22web.org/unable_to_format_sd_card_linux.pdf
    • http://idealica-italiaofficial.site/chronicles_of_narnia_full_movie_online_in_hindi5xjri.pdf
    • http://zaluwuxevu.iblogger.org/94736886763.pdf
    • https://static.s123-cdn-static.com/uploads/4467318/normal_5feb50ce0c437.pdf
    • http://winsbig.space/benchmarking_process8uqwv.pdf
    • https://cdn-cms.f-static.net/uploads/4423728/normal_60437c0f707a9.pdf
    • https://static.s123-cdn-static.com/uploads/4383304/normal_6006583a16fab.pdf
    • http://xabidewukolesas.66ghz.com/20403856898.pdf
    • http://sunmarkt.ru/harmony_350_remote_compatibility_listssn09.pdf
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5fc67902ca0d9.pdf
    • http://xogefod.iblogger.org/xarogimixodamefebozu.pdf
    • http://fotodosajube.22web.org/cuanto_equivale_150_gramos_de_arroz_en_tazas.pdf
    • http://bitawulam.iblogger.org/cub_cadet_ltx1045_deck_belt_diagram.pdf
    • https://cdn-cms.f-static.net/uploads/4426545/normal_60388b3166d11.pdf
    • http://specrazreshenie.com/misalufofabadokyh9bv.pdf
    • http://lajulikimerojeg.22web.org/51148638313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_9ad3531f274440d6b7ec771d0fd2df2f.pdf?index=true
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_d90d56c45c39458f8e4fa423f1d1f1da.pdf?index=true
    • http://vapojolojumow.rf.gd/kenagowuro.pdf
    • http://xilibosukotijob.epizy.com/51416433946.pdf
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_30e724285b4042beb68abfc04f7bd244.pdf?index=true
    • http://bamemuwibe.epizy.com/geometry_textbook_answers_chapter_12.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cafb.bin
e6244839ae3595dfb0dc8cb13ff6d7a4cae9e2b153d7ac1ff06357ac0206cbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFB 5280 bytes
font_01_sfnt_off0000dcd8.bin
0d9705860e7769d7d95b7044d962f9b8efb4ecf619dbea83634ad0304fa5e8e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 10348 bytes

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