Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d56f2c3d2fc642…

MALICIOUS

PDF

84.4 KB Created: 2021-08-14 05:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b5e0b05667329a33574651178ce9a06f SHA-1: 066659bce5341a6957642ff6d8e40c7be9297b7f SHA-256: 92d56f2c3d2fc64243407e259f18c0e87f5a54ced1c46b30e1b3920b6e0caa2a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://zhengfutz.com/v15/Upload/file/202152573502971.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ac2236d1f---88791490637.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/inq33r7s723tibas38g4evpan6/64302056072.pdfIn PDF document text
    • http://labsshop.com/d/files/jokofaluroseziwerajese.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607214be3fd13---30074389008.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/66507253075.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a65ee9413---kulizojefexowadatowaxa.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d3c1efb5121df2fe339953f9f2b6bffa/42595291197.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/25468864505.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/69897208739.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/10646021396.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/ralugixarazegulopumazo.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/nibudadelirefipaku.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/52417738913.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/95409155576.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/79299760013.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/fewuxizupux.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df5e6f651b7---vobila.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d47187212---pebom.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/87035479042.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/9031753337.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/67973786925.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03d59635d1---xemugis.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/kabuwam.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/rorozex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=kcal+in+kg+converterPDF 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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 17084 bytes
SHA-256: 72b03fbe40bf00fb01fb142ecc320850898063d667050dfee72ebc13c7db4385
font_01_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7B 10384 bytes
SHA-256: 9c9a731d76a177d86bd5cfe36d17d5ddc71cff3ad0a46fb050be169b734e4f02

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