Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7392e967d8e4ac…

MALICIOUS

PDF

90.1 KB Created: 2021-09-04 06:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 89a4358480055dd887a0eb50a226ff54 SHA-1: f63896e109c8f605048bc98363f990c6630aade4 SHA-256: 2a7392e967d8e4ac9f0c1c533faa28b9c8d8441e8ad6aaf686377c98458b1834
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown-reputation URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://crewmak.ru/uplcv?utm_term=oscar+wilde+salome+pdf PDF link annotation
    • http://www.iece.in/userfiles/file/petifid.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/80267813964.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/35533743662.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071c335d5dfb---1445142098.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/62923127650.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/b5c7ca82a5ebc40e704463c67876bf3f/81145571437.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/xanipivibabuvuxeb.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/37346862940.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d557059fa---mesofajuvupexuworudumo.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/1ade543a3295e1e2b69756e9e86cdf5f/nekojexubafazizupuves.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/34131727028.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b140b159e22---31744558323.pdfIn PDF document text
    • http://change4best.ru/upload/file/27748893274.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/wumara.pdfIn PDF document text
    • http://snft.ro/media/file/50075577476.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/gozodagubemolisajapakul.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/161156e86ea4f4---daxerefibubimegarig.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609625843fcee---mudiso.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97d04480a1---zepazeluduvivi.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/fatimanadelikuz.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/83513596930.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/439225fe04b1193c7a7a4fb9e9fee771/lenabuset.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a349631b302---wetokojorusunefo.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/lesedopuvanovepuko.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/80673425928.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/65937722213.pdfIn PDF document text
    • 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_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 10692 bytes
SHA-256: fd3ae42c1ec442961b7847fd698e043efd874912e51c47fe00fa94a24c775905
font_01_sfnt_off00010a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12298 22276 bytes
SHA-256: a7d401a26d6ecafb1ed56b44da98726df760c566cf721e269398b7bd5d444dd7

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