Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a24a9e3f1b49f8d…

MALICIOUS

PDF

79.6 KB Created: 2021-08-25 10:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1fd5723ca564b061098aada59fbb3db3 SHA-1: 8735ac2ccd6e912d8f276e7811f942c9288657d9 SHA-256: 5a24a9e3f1b49f8d6df139e95d57b00f7522c1f40c673cb9243d7af3b9fec467
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to external malicious resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/l4khssdrvbbsgcovs3pds5coh7/15474293326.pdf In PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/cfb4d97cb792daad23b5612e9c5b1805/56778925862.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676af4dc68---xibisux.pdfIn PDF document text
    • https://inunekocp.jp/mailmagazine/upload/files/77952915369.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/desigor.pdfIn PDF document text
    • http://coffee33.ru/archive/file/ratoluratuwepaxisizozu.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/42d2f95e55e7e100e3f1ae1e2f700396/10068385854.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/31126332773.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/vexuzatadi.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/32269115794.pdfIn PDF document text
    • https://j26clean.com/upload/files/wedepeliwosi.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/panowepuvakavigajelogefu.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/remevidolobezufetalozax.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/tpqhq4hr2st2qfht4jh95dpv5j/50554331286.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ffd3a7494f6edabbb6ada471705e3c6d/dakixeketi.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/waxesu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886f03e0cc9---45053720132.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1af404cb4abf276faa3ec746bfbe590b/budoxivomasatiwibipobaw.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/mitukebopitozivevunexuxak.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/29237471887.pdfIn PDF document text
    • https://digireg.it/upload/27148337939.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zebuvexidepebu.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/58134513459.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/lisegiwimoxaxuji.pdfIn PDF document text
    • https://tcremich.lu/files/files/mejoxovukajalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cephalexin+used+for+stdPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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