Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bcdc31a69c39fd…

MALICIOUS

PDF

174.8 KB Created: 2021-06-19 17:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 742b04685040e406d6570c46d32a5b52 SHA-1: a286428e171ad2ef030e12607058705255da58d2 SHA-256: 93bcdc31a69c39fd9d3e83ae03cc9c6e19f2127e5b408758ea893e2d561c0559
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5769

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://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b856755af20---4665232328.pdf In PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ct8nv8ih2u2hp6go7oi14p5ad1/pavetelukagokudeluneduk.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cb168079c43120b343fdfad6f499d463/93245525982.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/81960161797.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210519162141569625.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/370b7f33b9960a3bceb41ccdf9fa542a/zojapipo.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/28dc77d084e5f9a44d130bb5410086db/93310101916.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4573d734---25617378856.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609201eb48224---2665826407.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be3d333eb88---nevuxidekumaruxavanug.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d8be08ded---gifofanat.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ff894a76---66547545692.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160863051e8d88---toxifoxemejirimuf.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06e3ee0227---zupajofavokisosexirowi.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85f897562---vemitupikepexitufali.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/cc6659faf9eea11bbb3a35525b805a78/kesugerisusetaranelef.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0ace1c9e2157e05313a252dd664d6c3d/79735724428.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=we+got+married+season+4+song+jae+rimPDF link annotation
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00022329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22329 13004 bytes
SHA-256: 2adfd061bc187af2d83ab03da942840c212d5230899ea15b3a1bbb00a3d5a18e
stream_008_off0002965a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2965A 17192 bytes
SHA-256: cf7113ed32f275f8f99a271dc7fcc41f09cf3186a147839fe40983b8ac573de8
font_00_sfnt_off0001bcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCC9 26660 bytes
SHA-256: 7d437005f090fc9182cef5e6b53e996d6fad7e4dcff057756608d98f9b211404
font_01_sfnt_off00021136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21136 5292 bytes
SHA-256: 4b5bd4545fc6f3ed2caed670903271f124e7a24c6b689dd290476f5e3541d598
font_03_sfnt_off000247e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x247E5 4316 bytes
SHA-256: 11f2f9f2f663393604f624a5651653ebbf7efc1a9ed4627c826b957ef8b9d471
font_04_sfnt_off00025859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25859 24236 bytes
SHA-256: 5886ee764ae1e17e15d78424abbba570899c6b8dcb0e95c37cc378322a24e371

Open this report in the interactive analyzer, or submit your own file for analysis.