Malicious PDF — malware analysis report

Static analysis result for SHA-256 144659a8b0e03785…

MALICIOUS

PDF

73.8 KB Created: 2021-08-11 01:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 896a85d2515fae25cb57430e9ea304b0 SHA-1: 02cd513982cc9834b3dbf197bfde72bdf1b0a899 SHA-256: 144659a8b0e03785862624a2977244e97b4c57bb7e0dad450beb44a107f822f4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The heuristics suggest the document is a link farm, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3885

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 https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8nvf24hftk4uvv1ep1sg1nv9g9/3443539448.pdf In PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/nfve4oqsr2dbl0m1d0gkqnb1nl/zoneluniluvafenid.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/hlfuk01q83ebpfr3mab9o08ad1/risizilax.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/28e9aef9b5e167b016d5066c95dd1c95/46846701822.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/regusumumanosaro.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ee8a9321---wibafig.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/pufevexupu.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/wudulemiralatite.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/47589988080.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/73878920409.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/98064381824.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/jogetupowuzojedug.pdfIn PDF document text
    • https://bloc-immo.com/images/65005617635.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/76750815871.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/kedizaxudoduwubi.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/kedimonoralodo.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/31151661609.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e4bb3869---73699286541.pdfIn PDF document text
    • http://jljemc.com/upload/files/35197404965.pdfIn PDF document text
    • https://actorconseil.com/files/file/botowozumugoxiw.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/kipobitekixopifatibojed.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nurowejazegewilexumuno.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/75053798256.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//86536070635.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/2261143142.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/87d105e12fef509418fe3864fb97ca61/lufuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+save+a+voice+clip+from+messengerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 16316 bytes
SHA-256: dd83067eb133e7faa5eaf37ab1fe78ce06fcf953ed0f23962bc054b64bea50ed