Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5c88a1230bc0a5…

MALICIOUS

PDF

70.7 KB Created: 2021-08-12 19:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c5d42f1c8d6f909b9b73101bcbc305e SHA-1: 9cea7796f394e968bd2ee7e21f17fd05cdfb6d8e SHA-256: fe5c88a1230bc0a57b27fa1c4f83ccf97b3468494ec811ad2ebd56f5c07ac775
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it likely serves as a phishing or trojan delivery mechanism. The document contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8477

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
  • 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 https://garglob.ru/uplcv?utm_term=libro+de+historia+segundo+grado+de+secundaria+santillana+contestado PDF link annotation
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/52g9hq19jv4g6044m4kgu7kja0/febiwidivoviruxulilum.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef9adc8e12---zagisolegorifuwinozafexu.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abd9d14d4a6---7967174286.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53248434140.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/wofikamotuzapomime.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/50875009373.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/nutaxovi.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/50af8ef9dcf9d67722cfe84ecbd176bd/xalusomerux.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d399906d23---zabanumojed.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/libakagaw.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f4309dab7e2---zaguwakofuvamawitola.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/repogoxovizef.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/100150143322.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/beadb472ceef44ed6ea73505a641dd69/63000760417.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b5a93d8c9---fazexogorabigej.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/e4f67f47fcd152b0a87f70a30043fbd9/noforuzozedewanatawiraj.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/144fd4b0331ee05269c17babf46c928c/84706990669.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/626a96fec6fd2a6f9dee0667eafa1fa8/34518548033.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f7e631aecf8eb8b34e5ccee74d0a2643/gamag.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6f2597ae---wizoxoperakolud.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/rezakapitogubekofopukex.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rrj6on48gbh4hjk3l3i4hcte1b/zowuguw.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/xemutemofusepofi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0abb2cbe---savexema.pdfIn PDF document text
    • 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_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 10848 bytes
SHA-256: 92ed367df859865d75d1e3bea5d691eaf5e2ebc5fd7b4de652bcf3cefb7e46fd