Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fcf25153bb3ad7…

MALICIOUS

PDF

91.6 KB Created: 2021-08-05 16:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 02c0c9f9b3548645a59c5e05e67afcf6 SHA-1: 8da9733dca87f3a7e781646a3a648acb1c1e71ec SHA-256: 15fcf25153bb3ad729a4c3d1c79dcc54600d189fcc894cfc1d9bab047e958ed7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055 Process Injection

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm hosted on compromised WordPress sites, with numerous URLs pointing to PDF files. These links are likely used to distribute malware or redirect users to phishing sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b77d0effe---15457829906.pdf In PDF document text
    • http://geniuschulatutor.com/userfiles/files/zitop.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/lefogew.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/gegisiputo.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c646d906d6dc257d813e92085702dff5/67218708826.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe275cd76f---turupepasadedakavatap.pdfIn PDF document text
    • http://princeverma.in/uploads/files/zafozebim.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/099499210c8868805092ee34a1ae9e8e/dimexewameliravigotegobom.pdfIn PDF document text
    • http://moristas.com/userfiles/files/nesivewifabe.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc84f842a9---gufazagulimanizilenod.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be24ec0a59---mojut.pdfIn PDF document text
    • https://stbenedikt.ch/userfiles/files/79333180295.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/1rd71mh0qpqh8nsn3g3k53talh/93228659107.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/pokajetupefiwigefakifuxa.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/0dee6aae431e9bde85dbe49217d4a6fb/60536718297.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a749e1262d0---zabizux.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/6569684138.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8058526be---totine.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00d61df758---57950894500.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609651a0e9c49---vagiwokanuginuxinoxab.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36447457fb---95815655766.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/bea8b97f45ba069efe3c633f23eccba7/goravapajap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=alimentos+bajos+en+sodio+y+potasio+pdfPDF 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_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 19452 bytes
SHA-256: ba724a60a8355494a489e649a1f3d62c145834a6519dae502f5e506a1df5f79b
font_01_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14562 10924 bytes
SHA-256: 0fa81e7851623337a53d6ee84bff697bcadafb669b84d999f47d1040f2134449

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