Malicious PDF — malware analysis report

Static analysis result for SHA-256 754b802949bfac2d…

MALICIOUS

PDF

82.7 KB Created: 2021-09-12 00:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 4e1538ac9063f9135aee197f9660ee2b SHA-1: adb03f526b0763b32ed93c491a99aebb12b0130d SHA-256: 754b802949bfac2df162dd865a2d0da607a9e57be09603590f9c40821b39e955
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210907235823669792wvk1pv.pdf In PDF document text
    • http://zulassung4you.de/bilder/file/masoz.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/suxavito.pdfIn PDF document text
    • https://isuzuphonoi.com/data/dulieu/files/16984214689.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/geralive.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/wuweledegetedotozidadax.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e020545ec906417e3db21094e553f971/sadukadagexesozaw.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/27629299228.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/92364987036.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/50068205892.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/bezesi.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/fefixikulagokepud.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/56213091549.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/6931974390.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631182431.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/c0ai5drpl3tbar8im4vojbvfrm/xajumo.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/74664701071.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/180506731.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/41699613244.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/mokajaburad.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/gepofumaz.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/bilaxuvafakesijivagen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=drive+angry+full+movie+123moviesPDF 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_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 11084 bytes
SHA-256: c7abae413f9615d0abbd7a7f3caab350b77f5d9c80e3cc86f65d39f9b7bfd58a
font_02_sfnt_off00010d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D54 18380 bytes
SHA-256: 2783134bba7513a95e4edc4b19b67a32407de398a348543c70289d615937dc1f

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