Malicious PDF — malware analysis report

Static analysis result for SHA-256 197a364fecb83453…

MALICIOUS

PDF

72.1 KB Created: 2021-03-19 08:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 975c5ffb12d960b733acbd625bfaf80f SHA-1: f7dd02d43ca1ff326e30184b6e292d636a1212b4 SHA-256: 197a364fecb834537d82c470b2dfdba03f9817186269e3cd9c478a03920a5d3f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/strik?utm_term=ranger+rci+2950dx+manual PDF link annotation
    • http://jukejed.mypressonline.com/transformation_math_rules.pdfIn PDF document text
    • http://xuxuxib.iblogger.org/28657412510.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/last_of_the_mohicans_soundtrack_promontory_mix_mp3.pdfIn PDF document text
    • http://fukoxonezadanom.22web.org/agenda_21_onu.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/praise_and_worship_songs_2020_with_lyrics.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/17605236756.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/tipikaxe/vibidoragamuris.pdfIn PDF document text
    • http://punotonaduwize.atwebpages.com/what_to_take_after_english_101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa3171df-891d-4daa-88d9-ab42ff332556/39631706460.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/wajijudafumikexokemupak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22745d2-4cfa-4859-a559-f673b6190ade/oracion_para_encender_la_corona_de_adviento_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b811b2db-560f-4cbe-af65-29bb771a530f/wosupesafobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5cbf132-af38-41d2-930f-0662c0efde48/fadokawunemudexatevuxero.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/hello_kitty_printable_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/86481866042.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/what_can_be_programmed_with_python.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/32824229617.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/charge_off_on_credit_report_means.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/19656147388.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_off0000d768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD768 5712 bytes
SHA-256: b61369428ac525e9ab1595026759eff8629f353b8084997dcdf8324374b648b9
font_01_sfnt_off0000ead5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD5 11488 bytes
SHA-256: 816fac209e182ae305657fc5b18cf738b219d086d1a5914b72da536c0e2ab0a1

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