Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11fa70b9bf800b3…

MALICIOUS

PDF

67.9 KB Created: 2021-09-24 19:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 329debb31986b11b7a768511563b6bd6 SHA-1: 7fb82174b44befca7e3cba7db8832e684a7ec03c SHA-256: d11fa70b9bf800b30c1f1a13421f675def88f4eb45a567e334d66b0f3aa5ff49
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.logomarcanet.com/userfiles/file/kobezonagorixojog.pdf In PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614d42410f911---58164750773.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/39309228584.pdfIn PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/fiforotesulowowumejusaz.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/jenokufexiv.pdfIn PDF document text
    • https://produse-zilan.ro/files/83407090706.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/gimatifebozofoxuzipalus.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/tematikig.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/43990715178.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/96369089387.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/wojule.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/23e0530697b74ba2810eaee5d6f7febb/dodane.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/71565210713.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/98273383299.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/norifemepujemeja.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/22092614393.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/xejerabob.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/gubujaz.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///wibugidegemofijivadodurur.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/6c814ada74310657c30c1088f1211070/14419828501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=idm+crack+6.37PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000ab1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1D 10268 bytes
SHA-256: 6f248a24207577c637efa8422b99f61c1bc553ac3d5f0d81e9d354677cc298e3
font_01_sfnt_off0000c248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC248 15796 bytes
SHA-256: 94ce015a12bb62b084207984e918bd8499db852009a29ddebb9af6ec662082ef
font_02_sfnt_off0000eac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1