Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3cf35ceddea5f6…

MALICIOUS

PDF

84.3 KB Created: 2021-09-06 17:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bc8ea045bd86326cd750022b887cbd1d SHA-1: 7fcec27bd6cb2fa60f7645ce5d4989ab2769663f SHA-256: fd3cf35ceddea5f6cfa5c84aa019ceca736ef2023aaf776b88e79efb64646c32
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the heuristic indicating a QR code lure further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff9949891e---rufodimalidirivaru.pdf In PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/febde7628a446795b1ef1fc5cff4fd06/goziwuvevux.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c025fe5bdbfdfe53a2a98684df264e56/61680096980.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/4316694831.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8ca00553---54782775152.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/firilipepamaxuja.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/54399fa4892bd8e75c4cd374e3b9852d/sevisipololudu.pdfIn PDF document text
    • http://4bx.pl/public/file/giporepugapew.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/60132372549.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/buxatekabirobokuve.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/73004614078.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9515ac90cc---dimezesudafus.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/91435333267.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d406762a1---mugejubebodijejed.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d46cfd9015---kebug.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/r6gipiddbmbhoo6pab26qm8epf/56219741003.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/debibepoguwasasepejozako.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/40050681127.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd6e6839dd---32130756966.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/46cd6eb7c81158ce802f73f991386cad/11237763503.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/xilititufaxejoxi.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/miwupakefi.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/wadimopujolitonideto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=2d+barcode+sample+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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 17796 bytes
SHA-256: a9e16848fdd5e382170280b04ca6b645ff845147fdd12a8b29f4483c07b280f0
font_01_sfnt_off0001131b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B32 10648 bytes
SHA-256: 1f6db03edf11c623b71b411e203e33c3cce9bb0197bfb86b4ab9566846e5885e

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