Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f03b8bc69f2a3cb…

MALICIOUS

PDF

54.0 KB Created: 2021-09-28 16:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 6e01739450437640149103f9d877eb15 SHA-1: ae2c4707d54216ca6fa515df1bc9c00e8e3d524d SHA-256: 4f03b8bc69f2a3cb8903f4a41e910309a66b13ccd5c9bd9aa6a5c867ab4f543f
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 an ML classifier, indicating it is likely a phishing or malware distribution attempt. The file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of compromised CMS upload links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7609

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://pistant.ru/uplcv?utm_term=how+to+draw+curly+hair PDF link annotation
    • http://dallapietamarchisio.it/userfiles/files/55380248810.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e355c8bfbb---zikiwifaxixewo.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/kimoxasonazumefogebovus.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/tafopusiguxiwuko.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/83472880942.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/rebafitu.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/xixerobowe.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/862dd6ec3b49363c6bc641ea7bde89c1/bujabumaledubasudowax.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/rufalosinodelaketixonup.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4ef437f23---7019111923.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/42929153412.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/7244188901.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/98410140921.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/maxokikojunodajupa.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/60712057926.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/fozagaxalowubidiniruz.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210902210850.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6176_20210917233131.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/nunedosuruxavizakixawowed.pdfIn PDF document text
    • http://gdgom.com/upload/file/210911173517819473ko1g2o0u1o43.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/jowokoxuxivezo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352742b160b---xaruzon.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210910092250.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/33902769092.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/nuvasobijixozekami.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46C 16220 bytes
SHA-256: d9fc9bdacc1151883576fb6333afd25d330939cb51ca752e84d695cb1c81afcb

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