Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de8eac2893b7079…

MALICIOUS

PDF

69.7 KB Created: 2021-10-08 01:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8e580013bcca92c709688485b40ba060 SHA-1: 8d2a9d12c8c73afddd01d4d4dc8d03869e01f5c0 SHA-256: 7de8eac2893b70798e9b7edf57e7e594b757151a5568e90442111ce43e0b0d8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://bbpcosmetics.com/admin/upFiles/2021-9/file/71471950789.pdf In PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/wigidabikupapovozos.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/lejiloxo.pdfIn PDF document text
    • http://qigong.ru/userfiles/file/kavalikaki.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/e80a6ca4c9575ffbebece81502683b92/libifevuri.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-01/210901052716934223kd93k9ac5l7h.pdfIn PDF document text
    • https://ghnservizi.com/file/fagej.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/jexogunevamezigo.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/fasenupomijuw.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/45533849320.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/fuziteturi.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/rakogomigizekare.pdfIn PDF document text
    • http://kccmaul.com/files/files/15866078837.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/64335951594.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/jupiranikewigokodilofoni.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/lajowo.pdfIn PDF document text
    • http://minipit.com/data/files/lulaluweruwonuzesetowiwaf.pdfIn PDF document text
    • https://photofetimages.com/savilum.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/74158266825.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/nosakopovokupiban.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/36245643354.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/letekipajire.pdfIn PDF document text
    • http://erfanekeshmiri.ir/userfiles/file/90775765085.pdfIn PDF document text
    • http://all-premium.com/user_file/files/16916940304.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/vanegepa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=beef+fat+good+or+badPDF 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_off0000b4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F4 10312 bytes
SHA-256: 321b335c84b6f6bcc6bcbcacedb3933c4a27659e8a83600d3949b58fd8c75113
font_01_sfnt_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE438 14808 bytes
SHA-256: 4a46b50a9a8322c25e71c3c2008b08f5238af784c49b28d0854b5709400a7af3

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