Malicious PDF — malware analysis report

Static analysis result for SHA-256 117ca3040b17023a…

MALICIOUS

PDF

68.5 KB Created: 2021-09-05 13:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1aeb6aa4b0c70c329cc0c7d73c582106 SHA-1: a25ed16d29aeecfe9a135e0aa8ad70c3afe42cab SHA-256: 117ca3040b17023aebfac42d45ab224f66544956cb47b89af5e94a7e9a085ead
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of multiple links to potentially compromised CMS uploads suggests a tactic to host and distribute further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5771

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://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/733b39b6ee065f37ffbb1d058718d127/bijewipisugedibuw.pdf In PDF document text
    • https://cyberbirddog.com/userfiles/files/nowudiragiwazosi.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc62b8b4bb---96844803093.pdfIn PDF document text
    • https://phr4u.com/files/4752943531.pdfIn PDF document text
    • http://status.cz/UserFiles/File/pejekowi.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/6292561064.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106181721284168.pdfIn PDF document text
    • http://htwy.com/upload/file/51582707704.pdfIn PDF document text
    • http://dd-eng.com/files/files/setuwozopen.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/4401855511.pdfIn PDF document text
    • http://gardatrans.com/content/Files/letuxidewopija.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/motuwovopetefefadugumode.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/38080254078.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/somowivatuzevabozodiriwal.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8cb65f23614e2d53edfefd6991ba1922/mipejumimadewuvineta.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/valizi.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/4677766172.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/lizabedapuxibavobanuludir.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8e8a48208---kuwonukezowoba.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6aec24254ab0e3d714a40c86a926ad5f/widaxixinuvetewudezezuma.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/xapolanaresikerugikozon.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/71546651690.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ab125ecb4---35723763943.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/nupewivuxapejonavaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=present+tense+er+and+ir+verbs+worksheetPDF link annotation
    • 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_off0000b87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 10684 bytes
SHA-256: 2c3578e53961c4fc6fb0920e1d837a2b2556a7fd195d19de4c81eacd52885201
font_02_sfnt_off0000e916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE916 18376 bytes
SHA-256: d0aa8894dfaefc59f603e2773485573713d922949799c77a639e017b7d2c1652