Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8d9be37c3920fc…

MALICIOUS

PDF

87.4 KB Created: 2021-09-04 16:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 89dafe2ce1a67632fa0cfc05d06dc82c SHA-1: db002158d8fc176e309676e017701b0d0b3a884c SHA-256: dd8d9be37c3920fcd843089cf012a903e7ce0850330eb0cecccd932c122a0b5f
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as a phishing trojan. Static analysis revealed it contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.1534

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://irlanc.ru/uplcv?utm_term=democracy+and+delusion+pdf+download PDF link annotation
    • https://gruntbudowa.pl/files/file/bivofijepaxep.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/libuwivedibivurutizage.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/kozozadirokiruzu.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210724101213_1ygk7x.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0260b76e85c45851bb90924f4f6e6286/78141367599.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/70042404540.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/46093364849.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/vomisojumodonav.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/papedatolab.pdfIn PDF document text
    • http://euro-ex.net/images/blog//file/gozimolo.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/zobarutovuxijepujanule.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ut70ki7u4q2cbidj4qaji8qbr7/45833926481.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/xizurevab.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/5ecf43f0048c8b600b78ae5724f780fb/57155505710.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/sedimoxadarozazedogonevum.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/e5bc45cf50aa8ad7450c60e2bf5db775/19944109628.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/5bfea4900aceda15373416423a1423a1/wivopasilu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160edb832ad3d9---nixituz.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f48b8e51e1---27186719705.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/26374084777.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/91384095558.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/854f632a1f414933b1c4077dd018217c/xigubofowujabodiwu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a62a2c21---73824870551.pdfIn PDF document text
    • https://senhewood.com/d/files/85256257696.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbef96bd1bd---89162186835.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/bexajevojiridujej.pdfIn PDF document text
    • 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_off0001089b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B2 10984 bytes
SHA-256: 19da340b3511499d425624be0b6d3c4ea229272cb2aef28b21db0140ec687bba