Malicious PDF — malware analysis report

Static analysis result for SHA-256 772647f967b1f41b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 00:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d08af693159c2a2298e697f77362e01d SHA-1: 8e60190cc28ab39026c02dda313d979ff82c8df2 SHA-256: 772647f967b1f41b938eb74c6a94017bc098b8f0d42c2e218e630b0c53129541
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking clear user-facing content but containing embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5347

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://aslimitada.com/userfiles/file/vokomukawizopilerafepubo.pdf In PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/stcjb31v8ud4vgis167ncf1ugn/1441881429.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/560937988.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/fetujikupo.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/36019800051.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/guvotutexivamewajeg.pdfIn PDF document text
    • https://brod-plovdiv.com/images/fowutaledejidanuvesovak.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/16594877013.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160d78102daa7c---nefukanuvupegoko.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/ramojegapebixu.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/97207213509.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/eklfief5tqqd530hbk34hqjslg/97806590763.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/f3be89f92faefa9ba1435bb1e57be175/73791277459.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/76348372045.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc95ab14c4---nezinuxilujaf.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/wawavag.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/joweripavivok.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oeqg1u9chv3dan795kknvsn2lh/45517546384.pdfIn PDF document text
    • http://evola.it/userfiles/files/kigibivoxibarit.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/49077539b19a534832fbb100352e7946/pogekilar.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/rulekozutolupasabuledazas.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/majezumewufuvilunuguf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=preparation+of+chemical+solutions+pdfPDF 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_off0000db38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB38 18264 bytes
SHA-256: 4539788d3aed338d118339922edbbdf0a2f0da7243cda737a9b000c22ba3b9bd
font_01_sfnt_off00010add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 10984 bytes
SHA-256: bf365ed23d387f396f3ba0c2d5a03151d65748f945ae92e5b0ea3f8202b57c6d
font_02_sfnt_off00012423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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