Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47d654773a7b231…

MALICIOUS

PDF

82.7 KB Created: 2021-09-14 07:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 793f6052eb54e9760f700fea9dd68d9d SHA-1: b442057f5dbd83af3f234bc0654d2a8fbf2b626f SHA-256: f47d654773a7b2317d14bfd81ea116ac3c9a9033ce923ccf13f0bf2042d741c4
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, strongly suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://catamma.ru/uplcv?utm_term=iphone+30+price+in+bangladesh PDF link annotation
    • https://pasarangroup1.com/contents/files/26338146578.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/60829796166.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/refowifabitu.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/78005504568.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/95657343320.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/mokekamekodimiwawesikijo.pdfIn PDF document text
    • http://stl-hk.net/userfiles/xofovoridul.pdfIn PDF document text
    • http://apart1day.ru/file/jototuridoxoselazad.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/pijageboz.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/25333332846.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/76435670596.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/bitudimuda.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/vefinujabadozurix.pdfIn PDF document text
    • http://sinostandards.net/upload/files/jawediniziwomazexim.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/vigitotubejag.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/puzijetin.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/warugalikipuledam.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/luvelutujalusipivigupamub.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/xamoresowud.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/32954444581.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/60147717803.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/zarawukasusozimirovuratof.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/13880736269.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/43615660566.pdfIn PDF document text
    • https://crbz.ru/userfiles/file/navapavowujunokurukiravo.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://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_off0000d8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 11080 bytes
SHA-256: 193a08d30fe5697bd58aa3063c042275b31b1431e943c6332ec4deefc3c371ae
font_02_sfnt_off00010a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A21 19588 bytes
SHA-256: aa83604fe6b2ce9af55ada48eea9bda41b2bc0ba2e2b5dc112d1f917d4aca755

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