Malicious PDF — malware analysis report

Static analysis result for SHA-256 184f10e19489fb82…

MALICIOUS

PDF

76.3 KB Created: 2021-09-20 01:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 38d49ce789784bf4ca9c89c3951d5cc8 SHA-1: 30e1ac05bd0bc01d5eb44266e873b33d6bf2ea9f SHA-256: 184f10e19489fb8280e10f771871f65dab3578b1b3bd9a30e64221019fd61f2a
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://movitecnic.fr/ressource/site-image/files/70821569869.pdf In PDF document text
    • http://tgroupsrl.com/userfiles/files/xusefim.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/73161287747.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/wukewowemefepu.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/72148858678.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/tipotesuw.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/neserugesa.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/54251605118.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/25882605752.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/52190561334.pdfIn PDF document text
    • http://potlista.com/file/files/11628275098.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/6249779005.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/gexufexodujeb.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c96e2df65---20827392799.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/75657310819.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/66604844031.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/95005336782.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109031918387189.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/bezoxa.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/14421245665.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/92783378253.pdfIn PDF document text
    • http://metapolar.hu/tmp/3277002362.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/27830808140.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/doloku.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613785a5f05f6---19365046430.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca73ba33e---63976937963.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=best+recovery+software+for+android+internal+memoryPDF 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_off0000c6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D3 16712 bytes
SHA-256: 2a1ceb925ab449e6c713ad2c181e6e1e02d4367b74ca94eb036bf3ead59ea937
font_01_sfnt_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 10956 bytes
SHA-256: e2e082690ca7c30bda6ad8a441c86297c1c811b13b60001d56ca1d44bde1db18
font_02_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1