Malicious PDF — malware analysis report

Static analysis result for SHA-256 b884520b1846377b…

MALICIOUS

PDF

79.1 KB Created: 2021-09-20 07:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc0dd76c0e0d013341449a9208dd0522 SHA-1: d6af10956f67a18bf105c2aa343b347073185cf6 SHA-256: b884520b1846377b68da9d1b48c8f178ce7705e2f80da0b59c44634e579941a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall nature of the file suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cructi.ru/uplcv?utm_term=paranoid+psychosis+definition PDF link annotation
    • http://portalpr-b2b.es/img/user//file/_0417314001630567203.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/lazowixowavubodenojuzi.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/93540501913.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109100008278815.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/43708684912.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/52111354321.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/wipaxuruja.pdfIn PDF document text
    • http://jycjqj.com/uploadfile/file///2021090822085070.pdfIn PDF document text
    • http://it-hair.com/userfiles/51193824134.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/gejubazuxudoku.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/91225860394.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/nusaduwu.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/3089955755.pdfIn PDF document text
    • https://siemreaptraveltours.com/userfiles/file/vokedubumepigugejorerate.pdfIn PDF document text
    • https://casartigianiudine.busletter.it/ckfinder/userfiles/files/90201543086.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/wefebumivikimozuxagagosi.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8188e4073801653d86585de1130279dd/nepusisirurijaw.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-17/20210917210524949886.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/napowo.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/kopuregodik.pdfIn PDF document text
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/91888417363.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_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 17548 bytes
SHA-256: e9fe03836b5ce0927fce723aa4aeb4882be372dad1da51ec2f207a74daf31d14
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C0 10784 bytes
SHA-256: 427440a5377c9b417eede0fcfc288690315e497395c30c4631fe707b9a548174

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