Malicious PDF — malware analysis report

Static analysis result for SHA-256 767fe01a3cbba272…

MALICIOUS

PDF

163.9 KB Created: 2021-06-17 20:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 24403fda24862ff0dd393d4fa5d64301 SHA-1: 86638dc02f13f53873685b6fe22a1c76fd95305a SHA-256: 767fe01a3cbba272706b18d478d87d8e0d507cbac62ddac5971a1170177228d5
156 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 0.9866

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://archism.ru/uplcv?utm_term=persona+5+royal+confidant+guide+haru PDF link annotation
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac236a58c54---tewidog.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/bb45094d087f8f06726fa2f5b4577be0/rejixejadev.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/62022345966.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6i9me62si52fdfs3v0di919qfr/85841845348.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c8df3496c4e---lavovesimizasotazesija.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4bd195f3e0884462bccd88608433d15c/wugilari.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c24a422e470e43b4c07aff9ee23eb1d7/99090997722.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55a349c9ef---42688226026.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff8ae7dc48---sapibetavopuwujatadiwati.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/on5p10ubq931k61l61619cf0bq/moduligatexo.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9578e5b1f---vazowijorobopedulirina.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/f6bf2a347259059a1cd3d0ef39b62128/nenelutetegakog.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/tipalakevobesaniwevujal.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/307048df4d97141da16380e0b085395f/pitomiza.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/gaxagagewaride.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210610_FA8D1C68D84F2E05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001aca1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1ACA1 53344 bytes
SHA-256: 0519e68fad930a1b98a7a36121c8d5e51049ac34fccb4e49fa00e73ece5ec2ce
font_01_sfnt_off000250cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250CB 5508 bytes
SHA-256: 7fac7374e8280e5298f96c10e4faa76638ac9d2c757a307ffaba3889d3e1f9d1
font_02_sfnt_off0002638b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2638B 12344 bytes
SHA-256: dae6be014ddcfe7a5b0771784af5e7a65152320abba34c4413027a1eafd993de

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