Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6eb262c6039c4b…

MALICIOUS

PDF

78.3 KB Created: 2021-08-28 17:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 521df990c1af1f6544c82e4e975fbd41 SHA-1: 42b2198f1a83ede760e407c0334259c1ae5ee2f2 SHA-256: dc6eb262c6039c4ba8fd73a271c6d599c37bed2a0256804b5f2030c25da8be9b
164 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of a link farm on disposable hosting further supports a malicious intent to distribute or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161007bfc1467a---15333898588.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f099c266a6---1353557468.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/pifojux.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ol5s5qo6b549p7p79vapgfiddv/2188737389.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/ef8dbbfc666166102255b868caea437e/zizexod.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/jogisale.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/xudiziguzuwer.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2766ae0d0d---90385438719.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/fogutesefuxevafotujago.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/29iesajemgq9chjd0d906j3e9a/jizakebik.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bis2p2q7kgpltfki5vk387s9b4/77000852784.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/sunuwupoz.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/vazosubibarikes.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d044366b297---zakezurexineraroguxowek.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/30435024099.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/bae7a00f5651a48c69c2dc5343f91ae1/57869709978.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2434dde7d3---butagexebosijopagibije.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/povarakifoxazaxakigoz.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b44d89dfe66---wekezumalalevegixivowu.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/susoxadoderus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=answers+to+brain+teasers+questionsPDF 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_off0000cd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 17928 bytes
SHA-256: f867618c27172d63b3dfd25a7061a3ed177e182ab117896f9981501185d6c95b
font_02_sfnt_off0001132f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132F 10508 bytes
SHA-256: a46c561b48c7c90050ff4057649b213ed06f9f2003ed6a746a4a7bba6cdfe97a

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