Malicious PDF — malware analysis report

Static analysis result for SHA-256 46694e1134bd3f1f…

MALICIOUS

PDF

73.6 KB Created: 2021-09-15 15:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a630a9aa6c9bfd60dcf54c2366c09b4 SHA-1: 32f95d4ac71857fc375a32e922f26dc5aa5f20a4 SHA-256: 46694e1134bd3f1f5f86ed86d0c9df7efc989a5d947d47ce798ee801df6dbe03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent. No scripts were extracted, but the overall structure and URL distribution indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=save+texts+to+sd+card+android PDF link annotation
    • http://studioarchterreni.it/userfiles/files/jelokikoxibitesetav.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/betanetotoda.pdfIn PDF document text
    • http://kechengchem.com/upload/files/pobuvenasitod.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/37739712910.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/boxusuzofomezagisumo.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/lavalu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c7740eac---90685187347.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/50147488606.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/pokemi.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/bepafupezo.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/98707944724.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vedaz.pdfIn PDF document text
    • http://halmar.info/userfiles/file/nolese.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/25276915053.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/sezixutezulozoveseru.pdfIn PDF document text
    • https://geya99.com/ckfinder/userfiles/files/tisonodirotojijumozugejos.pdfIn PDF document text
    • http://chieucoingason.vn/files/68997774400.pdfIn PDF document text
    • http://gnatowski.pl/attachments/file/sotarexapekovojafada.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/redejedubexafusubifet.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/91335802916.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/38485122495.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/zowikefevarolu.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/kefezavusuwanadi.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_off0000bece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECE 16200 bytes
SHA-256: 6ff64516acabd4c7a6d2523dbaeb7207b24c8e356543a593c8e12d4320fa54af
font_01_sfnt_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 10560 bytes
SHA-256: cacd1e79b4269ebaee8d55461a09082683bcaf54237877318a13d6511bc406e0

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