Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bd82c843724762…

MALICIOUS

PDF

79.7 KB Created: 2021-09-20 00:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fbbdf560470b9a6931f305fdbeb1fbb5 SHA-1: e2bae56541816903fd427af36e1082f67dd78b40 SHA-256: 38bd82c8437247623ee42d8ede59afbd192fe164ec483ab1a449dc68419145fe
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is financial fraud, likely by impersonating a financial institution or business. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://saluteebenesseresas.it/userfiles/files/lenebelexebitotevona.pdf In PDF document text
    • https://securitydm.com/slicice/file/gakenirizevivulegaritij.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/4012642856.pdfIn PDF document text
    • https://sim2007.com/files/7831353975.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/nudasumimuxutiziwewexenom.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/15505752666.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/dcee3b6777743a1df177abfa4b103e2c/73717346738.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/59805126639.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/rarelujije.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/32ojfm945uhdj88sbnedlmai53/rajigubawekubejopep.pdfIn PDF document text
    • http://sooclose.eu/upload/File/92434937979.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/zidukinoso.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210905183713.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/luvegeri.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/11351217597.pdfIn PDF document text
    • https://avistravel.activsport.ro/userfiles/file/vexipi.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/lizelar.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/43319331889.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/061200514217.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/38610730129.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/tewobowulejivot.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/manumariketelebezater.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/59133033872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+u+know+if+your+phone+has+been+hackedPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 17076 bytes
SHA-256: ce62f544de997b9dbc1dae33a9475731ed51a5eda6b53bb334e80800e5d0b445
font_02_sfnt_off00011723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11723 11096 bytes
SHA-256: fbd4e43d5d8c770232e64d26dbd42877cba928496772ae8cd792c605e4ac409f