Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c2c8358628f6d4…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 19:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3272e3f6faa221c9fc2de4b47a658044 SHA-1: 1e3343d873bfdfeb12be876f33b3f75e54ba447b SHA-256: c9c2c8358628f6d4583c208e3cb87b2aee1fdc2e169479c64c06b23910e3cf34
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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 https://krisoc.ru/uplcv?utm_term=best+streaming+movies+free PDF link annotation
    • http://uhy-th.com/image/upload/files/2432695470.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/57459237132.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/menezamebawexisopixala.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161493a83860d8---nedujeji.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f903d9306b2e43af2fa6a7ad6903ff86/fijal.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/43996713499.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/titozokinememewewak.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/tovisalanufaxomaput.pdfIn PDF document text
    • http://timebymtm.com/upload/files/suradaxokapakamunokakip.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/33803274152.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/gitefukon.pdfIn PDF document text
    • http://haphadoor.com/upload/files/96402393382.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/witavovitu.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/30393034401.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/10661809978.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/zelubukadelaxetitanope.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/kazojikel.pdfIn PDF document text
    • http://wwsm-us.com/files/file/dagirat.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e795ed873db2fe020051006490ab4481/83823830914.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/xuwudowukiketul.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/saxonadodefi.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/fonazina.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_off0000ae9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9B 10628 bytes
SHA-256: 1569fde7eb9a78801620785e59541755caf577bb6ac3bbc24694a6f9844d69e2
font_01_sfnt_off0000c703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 14468 bytes
SHA-256: ac2217cae90f0914ae84988b8b21a15b8dd39f562173ed5fa62ec69968975f46

Open this report in the interactive analyzer, or submit your own file for analysis.