Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc5f50e5924299e…

MALICIOUS

PDF

76.1 KB Created: 2021-09-15 09:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5475dbf91c7227cc540a2ba4bc3a357c SHA-1: 46670c5055e17f3c2fb2f4b51cb24cc9f4bddb98 SHA-256: 2fc5f50e5924299edbc5ab16546d7af3e7480ca851cc0dbf26f401ea8836e4af
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, indicating an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JS points to T1059.007, and the nature of the file as a potential attachment suggests T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://philabc.ru/uplcv?utm_term=sniper+3d+unlimited+diamonds+and+coins PDF link annotation
    • http://s-pack.kr/userfiles/file/20210901181530.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/31295858652.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/23184933889.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/jupoj.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/60223245941.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/72853913407.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/91340b08aa1bdacbedd74b65e93bdf24/48658138782.pdfIn PDF document text
    • http://creativecoms.net/userfiles/file/8548111047.pdfIn PDF document text
    • http://osayit.com/images/file/nekakewegawonazitiputaba.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/45732542292.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/kilonozaviniwipexewizo.pdfIn PDF document text
    • http://apart1day.ru/file/jototuridoxoselazad.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/03/lowiwuxitejuwazokirurefuz.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/43968097600.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/2151028607.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141671754bee---jekegesavinedidafomuwu.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/bulafosakawagenasuvivopev.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/14749186673.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/dutesoluvijonojup.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/zerugabekete.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/bizub.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/74566858655.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/19844977285.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_off0000c56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56A 11024 bytes
SHA-256: 5bdbbc56d6a135b4f05f6cde807ce97dc8436700af316f31a32f575c8b7e9236
font_01_sfnt_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71A 16920 bytes
SHA-256: be9bdcb0add82e44bf11ca57deb370f85d385719e204cb584a1c916b3af3ad69

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