Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7bc26bcf449aa3…

MALICIOUS

PDF

108.0 KB Created: 2021-07-06 21:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d33b791a9af6b2667054f5ffd4424e02 SHA-1: fd1fdd6817f62fb0f05ee0e3dc4ad564ade167c4 SHA-256: 9d7bc26bcf449aa3e8362023b94418dde606d9c94dbfc2c1b6021459ec51b420
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/06c81fcc0a16630c1d7c125f7e4f201c/76206328578.pdf In PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/xupetiveweluvurelifozel.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3949ece08---78330095824.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/cquf569dmu6aahuqipisbqn0gv/tiwewawonuxerokojavuxafe.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160837f2a3a05b---vonolakejavowawuterebak.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/nolokibabitelikevinovevop.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ah01c5db5hqvqf65htkutubp1/taridafo.pdfIn PDF document text
    • http://turatabor.hu/media/39064106219.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/974ld4gk5grfejbhd296c8tu51/80626828650.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebf927772f---85642852842.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16081051206ad1---lobavadujasilajekezelu.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/45111861107.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/sugobikajijabenatebet.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2a39880e270ebad5092043b11a9cbe29/66773811213.pdfIn PDF document text
    • http://roxburyhs1987.com/clients/63080/File/mogilesa.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/nigemutapozuxonebok.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/58888297787.pdfIn PDF document text
    • https://lemanssrl.it/file/58200977282.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb187e8fc---79961890396.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9415ae340019f5e4500d7c5cf4ee8ab5/59458215526.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a63bd756c89---28428550747.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/d7vsu9duulbdblsd3lvpsdlrfk/75327567052.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/s9gst5gcfof33tdq2or5ia5m5u/42768875651.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/sd0vgkaue6arbj7hq3rfskg8bq/bupebolupolifikikiza.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/fujusa.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/vorazapibojomunojixazo.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/pobutapagewiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=english+chapter+5+class+11+question+answersPDF 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_off000144e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E7 11152 bytes
SHA-256: 20ce58904aa16c73aa6c74d9032c1aa88cc5d72f9e72aa37ab2940d6f829ee7a
font_01_sfnt_off00015ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000176d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176D9 16824 bytes
SHA-256: 50a6d7eb522f0267b6ec7b9ec044b63094e6c3fa70f3744799274b527b662692