Malicious PDF — malware analysis report

Static analysis result for SHA-256 561e721e9c1cf588…

MALICIOUS

PDF

88.0 KB Created: 2021-03-20 06:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036c45f91d0f602d4439d754beb3ff4c SHA-1: 33ff62bc663af125a5c77449c472961ba6add6b6 SHA-256: 561e721e9c1cf5889afbdaef80fb0abb734716f8d36ef50ebc06ee31d7f1b603
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL, identified by both heuristics and the document body, which is likely intended to lead the user to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of external URIs points to a common phishing or downloader pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/award?keyword=aneurisma+abdominal+pdf
    • http://vuvulusigi.scienceontheweb.net/jipizuneposoxikarufoven.pdf
    • http://interplast.ru/66408407668j529z.pdf
    • http://helper-badges.com/50096512787p2dyq.pdf
    • http://siwupezomejen.getenjoyment.net/34206337738.pdf
    • http://semasinizitowo.medianewsonline.com/angielski_czasy_wszystkie.pdf
    • http://dhl-order.info/22505555738vkbtx.pdf
    • http://bcpzonasegurape2-viabcp.com/navuxibarjbxxj.pdf
    • https://static.s123-cdn-static.com/uploads/4476421/normal_5ffb2d9ca5328.pdf
    • http://org-fruit.space/guide_to_managerial_communication_mary_munterzxdg8.pdf
    • http://werikipirojenob.scienceontheweb.net/foxokadoripuwagutubov.pdf
    • http://lovemecompletely.com/international_business_master_degree_onlinenn0vf.pdf
    • https://static.s123-cdn-static.com/uploads/4465402/normal_60037bb300991.pdf
    • http://feretefet.22web.org/cisco_lab_exercises.pdf
    • http://giwitap.getenjoyment.net/interior_design_software_free_for_pc.pdf
    • http://labiosdewonda.com/1877559918a8aa3.pdf
    • http://sopidemeleket.mygamesonline.org/ornament_and_crime_essay.pdf
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd67eb90e351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mizebud.rf.gd/1963628340.pdf
    • http://namakanexir.atwebpages.com/casilda_rodrigaez_libros.pdf
    • http://waxusumuguk.epizy.com/online_movies_er_with_url.pdf
    • http://pulitisagot.atwebpages.com/apj_abdul_kalam_books_in_marathi.pdf
    • http://nomekerileme.epizy.com/megudorudiwewu.pdf
    • http://nozulabagewena.epizy.com/types_of_carburetors.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_off00011a18.bin
926cb1c04d86a19468d5541ce3a4d923fdee6f60cde2c2ed2a0b69677faeb356
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A18 5316 bytes
font_01_sfnt_off00012c08.bin
ae151dabb40e5274a9fb07af8871258512d96bab91b2777ce3928cbba2d08eab
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C08 11592 bytes