Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ac2db6e84c4301…

MALICIOUS

PDF

81.5 KB Created: 2021-09-04 00:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d4540f0af2f895a8f774658096405bef SHA-1: 9a15ae862ac4c0d1bd44b776b39d815d1b9cb5b2 SHA-256: d2ac2db6e84c43012e657ca84556cc96323cf7b402f718bb6f71d78c32b45009
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7b498f32---dimigafawokazifenebazip.pdf In PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/giriwagidupexoko.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202108141600121315.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/valukufavisuvewo.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/8422cf67ebaf91589627ba00ee9213d6/xivajo.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/99751557889.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611df98f41cd3---97640227064.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/62693562978.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/tonunijamivemaz.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210622222825.pdfIn PDF document text
    • http://accronline.com/userfiles/file/2748617911.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/zuwafupo.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/97698017614.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/negoribar.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/97827993099.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf96bf0547---65479130607.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/58191747955.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/ee68a60feb4d43eabc416692b14f163a/50825193948.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611402c4b642a---53809711521.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0511e568f321c6fbb36580d5bc58f7ec/lubanirefonikupelexewat.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071657292dd8---29477007966.pdfIn PDF document text
    • http://contextuae.com/resimler/files/mifewusuvep.pdfIn PDF document text
    • http://servmed.net/userfiles/file/gorevojurikilemumadus.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/powedamejazijaxumonazeror.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d3f1a6b3ff7f6d91e9d70e55fdedfb81/benosakokejoja.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/80769409823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=punctuation+practice+worksheets+middle+schoolPDF 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_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 17300 bytes
SHA-256: 94b14455f3af05c223df306c9486d81955dad7bd20ebd66978e625ce44dc83af
font_01_sfnt_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBD 11060 bytes
SHA-256: d1f06ccebf34dc8c0545d47d33d50096a2a155b65fa11bfc4e255087b20bb100

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