Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e72b26aca2da16…

MALICIOUS

PDF

79.0 KB Created: 2021-09-09 02:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 583632c764fa45eb3f878ba204d72fc1 SHA-1: 8124c170aea8103ddd6ca661479be38f531f2244 SHA-256: e7e72b26aca2da16b6008f9388a6a6b0d2088c2a695eb73a28ce7b0322efeea4
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with multiple heuristics firing on PDF link farm behavior. The document contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user interaction.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3353

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 http://www.ondebiz.com/userfiles/file/wulon.pdf In PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/89824828813.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136eef97bf31---sodowawisav.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/mexatisuwo.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/zovodegonev.pdfIn PDF document text
    • http://feminella.ro/upload/fck/3339700055.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/mupuxujiwabexil.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5d809c698---85633781422.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/tubuwupukavasug.pdfIn PDF document text
    • http://newworldss.com/uploads/file/gebotefes.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/pejuwuwitipisop.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/vapudesevuguli.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/fetudibigepinanu.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/67052800765.pdfIn PDF document text
    • https://europartner2.pl/uploads/nalajaputuze.pdfIn PDF document text
    • https://edusfera.pl/upload/file/pupizojojem.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/89037995749.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/satijaliti.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210902_224852.pdfIn PDF document text
    • http://kco.su/userfiles/file/dugovikenasimisel.pdfIn PDF document text
    • https://shidoremicrosys.com/media/vagaritaxojer.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/5024949129.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362cae683c1---lujibedawi.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/nevokiseguk.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/51273032252.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/202197122212644.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/musigodexufisuxukumas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+villager+skin+modPDF link annotation
    • 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_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 10968 bytes
SHA-256: e4ac50b1bcbc9223a089fa0e284414a6f0082c7fcd4be742519b977b3c4f0c31
font_01_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1