Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46c8a0ab02a7e2e…

MALICIOUS

PDF

72.0 KB Created: 2021-09-22 20:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2b1d8ff7d289ba0990e034b1b63e4bbb SHA-1: 7aadaa6b0fb36855088826fb0791dc930872b7f0 SHA-256: c46c8a0ab02a7e2e57bcc3bf49ca60c6b04b2212126bfac1f2277349bc50eee4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to potentially disposable domains, suggesting a link farm used for redirection or phishing. No scripts were extracted, but the presence of many external links implies an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://projetounificado.com/uploads/files/rixuxewagenufunumiwewalog.pdf In PDF document text
    • http://gartenstadt-apotheke.com/userfiles/file/96796960963.pdfIn PDF document text
    • https://12shio3.com/contents/files/jisagulakefubuj.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/fesofotoko.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/jepimimo.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/simasosepepaximud.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/povilegezeni.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/31346574041.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd14c6b954---45250175633.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/54184459619.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/50246125029.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/vuniba.pdfIn PDF document text
    • http://centrons.com/uploaded/file/1048362612614451e4e4939.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210908145710.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/13538103686.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/vifojegitezaturunako.pdfIn PDF document text
    • https://limsurdua.com/contents/files/31109773470.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/xiziwekimilekan.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210905030600.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/90654499073.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/zepemiza.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340f2622ec8---sotetogatanenog.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/27422442586.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=audio+pocket+apkPDF link annotation
    • 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_off0000b777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB777 16972 bytes
SHA-256: e4126c0ea585d821dbd02b894e0a0e1ac9b6d714b60aed381d67c621cd642e58
font_01_sfnt_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10260 bytes
SHA-256: 54a96d1966928aabe307a86b1d4a965f03888bb18913e018631988cf885830bc

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