Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8272e9def1562c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-14 05:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 26cc0abbfe1ec4872d0ec32074ca9691 SHA-1: 78d816f59df5d879c29df21d080a5c47e8f14194 SHA-256: 2d8272e9def1562c1491b412e980aa3a56fa5efacf4a80a5162e5dd0f730112a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of multiple external URIs, many pointing to potentially compromised WordPress sites or disposable hosting, indicates a link farm designed to redirect users. This suggests the PDF is likely a phishing lure or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aromamahabaleshwar.com/ckfinder/userfiles/files/46984425866.pdf In PDF document text
    • http://oldmotorsclub.com/files/file/wuzovovidofibozogeva.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/volexali.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/53445029951.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/lusapelid.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/musaxisegeluxatefulofa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e514e9d0b---65922396260.pdfIn PDF document text
    • http://njchemland.com/upload/files/rekudekenidurowexi.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/17378267218.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/61002049044.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/11577677296.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/60818787684.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/60922932045.pdfIn PDF document text
    • http://sql110.com/pic/zutikonaki.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/87177728622.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/lixadimemipok.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7aca3fe72---wotoxagofena.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/lexal.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/10232349071.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/wuvoba.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f02c7c85bb---rapexepevefe.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/63089917940.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109141001002620.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec96b6cfd8---42795573400.pdfIn PDF document text
    • http://godsownproperties.com/userfiles/file/terafodafov.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/86379838579.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e698a32f5b---siniji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=piano+tiles+2+android+1PDF 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_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 17176 bytes
SHA-256: 2b61360f1e27cd6893e477afa6d2990d3396443a07d6c7e55f7748b1d786a364
font_01_sfnt_off0001050f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D26 10412 bytes
SHA-256: 0b641befa21c40a238d27da712d2adc3ec0d577addec265ab67e4de0fa234373

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