Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ca9243a65600cc…

MALICIOUS

PDF

106.1 KB Created: 2021-08-14 15:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1bda373db9e96a100dbdcfc7368458cd SHA-1: 60782b9b8a08d7d2fe9ac5b9071d52489f27f708 SHA-256: 02ca9243a65600ccb9342a575749971e69039d3e007cc905dea1705f26768087
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://oniceh.ru/uplcv?utm_term=harry+potter+and+the+chamber+of+secrets+book+review+essay PDF link annotation
    • https://advance-pack.com/editor_upload/file/xonirasodivepoworireleja.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2a6b1b7e302b5f7838af64e71d0e41f0/84098129464.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb1b4609ab---17116645801.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dcfd6ba91---devipilipexesabolawurawa.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/n468hdqm738ivftqo8cl0shn96/dafozakodinoxaxibar.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0353357e81---nobozavufadogipafe.pdfIn PDF document text
    • http://sigep60s-ncbeta.com/clients/44785/File/bufonetujonadewu.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/91808241598.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ajtslmngtum9g5a7g3vh9i2ci4/31620740993.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/11415794620.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160769e8b91e43---nepabowebilitage.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e64740396---61670992544.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ce4d14e8---bukomodid.pdfIn PDF document text
    • http://wirheiraten.de/images/file/5456810627.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4fbc96afd---nisad.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/jijowofovizogubenijos.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e18fde45e---rimivesasabomesuzuvezed.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/61563268180.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/j271uqnlue8vq6c0unm3dnba4m/83735121604.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1cbb2c483---rezige.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a1fb15b532f24b16c6b9b04ada1e8105/rusukajidagatimimapulevef.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/51456124638.pdfIn PDF document text
    • https://marigabung.com/contents//files/65222370234.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/12016426170.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/monasewafisubumipuzagaxol.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_off000136f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F09 11328 bytes
SHA-256: a4a1f2269928fcb2a4c3430494c031f90c3978fd1d696ab7737f057fe8231d1c
font_02_sfnt_off0001694d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1694D 18264 bytes
SHA-256: 4669ef318a325bad87ccaf0a181b869db32d207dffc03a9355b07bfafe169f63