Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2c7c095b48dd84…

MALICIOUS

PDF

108.9 KB Created: 2021-09-20 19:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0131b0ef177b2d3bc58655b72d06e734 SHA-1: ecec65c3ec031a82296efcbccc92d38c1a975a30 SHA-256: 9a2c7c095b48dd840c00b31ae61bec8abf8a97a53ae8489df414bc06c2ed6c31
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to unknown or potentially suspicious domains, suggesting it acts as a lure or redirector. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a tactic to obscure malicious links within a large number of disposable domains. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it is used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://floridagreatescape.com/media/file/vivojejaforesezawuj.pdf In PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/voxusodoposabotevege.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/oe7okvf7v2kiskrjv5cd9fqufa/deropazedovo.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/vedojavefobox.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/63533300716.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///totino.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/24161050766.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109040452273471.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/zokukonadu.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/gidobepomesijomadokitodob.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/18813198514.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/zizumazejif.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/23250421855.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/26658078497.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/vipupifunugud.pdfIn PDF document text
    • https://invest.pl/userfiles/file/48663718924.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/1663691335.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/kufivekimapukizow.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/00uadcthrkkj6hfb3csraohul3/zetuvofinojisige.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/317841953.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/nevexuwa.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/1193997967.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631946215.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/93568159688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=playstation+one+roms+for+androidPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/pogebajonolesugubiroroxep.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_off0001344a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344A 25824 bytes
SHA-256: ca1a0d5b2ec72cd31c125b6ad623bc2b02259b55416dc53d347ae1747ada3894
font_01_sfnt_off00017583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17583 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D9A 10632 bytes
SHA-256: f29abc455691b2f043fa2ec5dbd16f2825cee9c45f829a9b6eb130a487e74c96