Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a46e76360eca49…

MALICIOUS

PDF

60.1 KB Created: 2021-09-18 04:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b572efaf3fceae4a9e64fa9e1abac65d SHA-1: 5e42f3fc0f87d6e000038b96ec0fcb04bb0ae49a SHA-256: b1a46e76360eca498022be6ef45391160a0f313628588ea17ec1373c3fabdc4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5382

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://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143291800a36---xejitiwuludoki.pdf In PDF document text
    • https://xnkvinatimex.com/uploads/files/72018387483.pdfIn PDF document text
    • http://net-work.cz/data/file/kuwukiwor.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614078ae79ec0---35822220382.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/dabimu.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/bobulos.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/fuwob.pdfIn PDF document text
    • https://majubesar.org/contents/files/jibilarumojarofodesuxa.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131864ca140b---54353874849.pdfIn PDF document text
    • https://norservis.com/files/files/20801554668.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/22466920366.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/zarolukobitevirax.pdfIn PDF document text
    • http://trevorhannant.com/sizinivamidumalifexa.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/zadukerutomuludemigujep.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/27104223248.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/70136931353.pdfIn PDF document text
    • http://lovesenergy.nl/file/pibonetuwexojul.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/54816101517.pdfIn PDF document text
    • http://hkacca.com/userfiles/40446946231.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/zogerisoropare.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452b1096ff7---bezikaliru.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/35589648214.pdfIn PDF document text
    • http://xfswchem.com/upload/files/66247753848.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/43785291868.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/muxatit.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1777ddad3---3346262157.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=friday+night+funkin+free+to+play+unblocked+gamesPDF link annotation
    • 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_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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