Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73093eedd05852c…

MALICIOUS

PDF

70.4 KB Created: 2021-09-14 06:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b45d32bffbd6d74eafe49e92e1819b3c SHA-1: 2c2000c784c4df98ac444a7459b393f8c13f1df8 SHA-256: f73093eedd05852c366c35fc15330528179c08aff2dc54f5fd80cd3ebceb51eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The heuristics indicate the PDF links to a farm of compromised WordPress upload storage and disposable hosting sites, suggesting an attempt to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314f59f349b---rawadivizos.pdf In PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/30725308587.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/talinigidalogisawive.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/wedofuju.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73885479818.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/sidogexogax.pdfIn PDF document text
    • http://domario.ru/userfiles/file/49491049509.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/81vipgodqp20h1ofb50pcl65q0/vekirevizot.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/66630308838.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/19930193994.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/95015273791.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/76084419285.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/lupimogogewokelixebigamo.pdfIn PDF document text
    • http://hbaoge.com/upload/files/21007316221.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/wolilib.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/fitizi.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/13705752497.pdfIn PDF document text
    • http://htygroup.com/upload/files/70581178323.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/21526476288.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/70981195593.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b660c01dc14fcc8ca350397407010b3c/mutovowovepezi.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374869ad26b---15941182288.pdfIn PDF document text
    • http://precisao.org/files/files/74400175778.pdfIn PDF document text
    • https://digireg.dk/upload/79620243445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=windows+tablet+google+play+storePDF 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_off0000b4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FB 10900 bytes
SHA-256: b560cf4ab95cb9af9a5d9de37e62f969757de7a5782a87a7986840abe4a2bb77
font_01_sfnt_off0000cdf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE609 14972 bytes
SHA-256: a2d25d36a8817fc1021dc4c9dff428feef0fbce7b7b26dcb2ad52ee85d74101e

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