Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1961e2fb74f39f…

MALICIOUS

PDF

70.5 KB Created: 2021-02-24 22:16:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf447cc2384f2dc9e9bc8b18385acc9a SHA-1: 9e983ddcb61281879ed40c20be864e714a7e64bb SHA-256: 5d1961e2fb74f39f8ca008e8ad75eead74f5f2f609a87a883cc18919a4c7a064
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of the external URI and the overall classification suggest a phishing attempt to redirect the user to a malicious site.

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://crophysi.ru/strik?utm_term=sony+ht-ct370+remote PDF link annotation
    • http://kalavar.xyz/stramatel_scoreboard_manual11811.pdfIn PDF document text
    • http://nujilotadotila.iblogger.org/android_studio_connect_device_to_localhost.pdfIn PDF document text
    • http://goduvide.22web.org/lafitte_la_fishing_report.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/ggjihD4/flix_movie_theater_san_antonio.pdfIn PDF document text
    • http://mon-fortuneo.best/primavera_p6_free_download_for_mac1h5id.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/dX2Qkge/nelile.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/Dgiujfq/motorbike_wallpaper_border.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/N9jh4hg/24799806041.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://namidonom.epizy.com/fallout_76_mammalogist_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/aghori_dance_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/voleriloveza.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/44972034039.pdfIn PDF document text
    • http://bumumewevebav.epizy.com/54389235181.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/60880393640.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/vertebrates_and_invertebrates_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/madden_20_ratings_spreadsheet.pdfIn PDF document text
    • http://mabazekow.epizy.com/exerccios_resolvidos_de_distribuio_binomial.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/login_template_adobe_xd.pdfIn PDF document text
    • http://rugeritubaduw.epizy.com/sizawafejujaxota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 5240 bytes
SHA-256: 84d6daf7bfe44e665341d6e27cef50bc98a1861c34defd89770a34c9416fe2fc
font_01_sfnt_off0000dbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAD 10820 bytes
SHA-256: 34a74d2702d9202e6a0b586b3b1fd7c68c07bc644f05d9390f49a3f1e248a169
font_02_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 3380 bytes
SHA-256: 94d21f9cb82d25d4d35c17c14e7412a4c46a71573cd8b2f223bd9edc101edfcb

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