Malicious PDF — malware analysis report

Static analysis result for SHA-256 68aad4c73f1db141…

MALICIOUS

PDF

155.9 KB Created: 2021-07-25 01:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: d8497d50493b64ce2e894925e60df8f9 SHA-1: d4fd0fb06db760a52ee11bc77f4a847d0cef177a SHA-256: 68aad4c73f1db14196d72c14013f1ec3cc9fc05f8fcbf15a3c7286d8413bc802
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. No scripts were extracted, but the primary attack vector appears to be the distribution of malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc42745b60---26136608808.pdf In PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9b108f41cbd9e7c38d21df6659704e2a/19779764992.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/231659326abfa6a53f06f6da14ff3061/56112542837.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d0ce8692---32481908336.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16085b10372a0f---58653073950.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2d23d63d8---54187545316.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/61512892516.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9bab3116b8f493e5d186e81d2211ceea/nitidedugafizofegedek.pdfIn PDF document text
    • http://valeneighbors.com/userimages/xisobizedajufowuxavuga.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/5c6f60a9ae6e3f9e9503c0ba68f6743b/95276941149.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021060820142873499.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/folalire.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/2e0fa44010c60023469b1c7b1ab0eaa5/35216340220.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/sutimunopexosefo.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8f67677c---38441240073.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a9b5e2f1d---fejefarenosuzumadiwa.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/b14e771d5aadde7747e12e780fbc1b67/27539116730.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b881494e73---bepufipifipo.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/91649425432.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/namapoden.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/19780787079.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/681846f28d66dfe57997e8bc2d6d35ac/60964065840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=lettre+de+motivation+enseignant+contractuel+debutant+pdfPDF 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_off0001fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FB4B 11224 bytes
SHA-256: afc5cd162a04bca41272b10b3c30f4b5b97bfb14e02667126a2cba34c6331d21
font_01_sfnt_off0002152a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2152A 20212 bytes
SHA-256: 46bdefc6bc4c49e05ad7c18107710e11e4d9974cc14596c551dcdca9504417e6
font_02_sfnt_off0002473a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2473A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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