Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d809ac393cd70b…

MALICIOUS

PDF

93.5 KB Created: 2021-09-17 15:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 01ddb6c478d0c0d17b287f439e0dd76e SHA-1: ee9ac725496fcc9fac4039bd45ecc7306b6375bd SHA-256: d7d809ac393cd70b6bc6dbbf35b2a369837a5ccf0226afd3e403534615d446af
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • 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 https://stayinbranson.com/ckfinder/triplebuserfiles/file/piposaze.pdf In PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/3d62efceb4368ba5b87d125958af8203/7434248641.pdfIn PDF document text
    • http://belv.ru/userfiles/file/62709069272.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/vodibatenogavax.pdfIn PDF document text
    • https://idosekotthonaveresegyhaz.hu/files/files/84220246706.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/22669602585.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/53644660086.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613175be24fa9---givodevotobawo.pdfIn PDF document text
    • https://phongkhamtamthan.net/uploadeditor/files/xopemekupe.pdfIn PDF document text
    • https://phuquiland.com/upload/files/lewavopafibuvomejevigumo.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/93151937883.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/361c95b1c5ae64637adbf50d263389d3/bofitavixiwusori.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/wekodojawupasijifaf.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/nogibudizefos.pdfIn PDF document text
    • https://esz.jp/img/editor/files/83890928909.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/56189154307.pdfIn PDF document text
    • https://hinodecoder.com/userfiles/file/29781539252.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/182530280.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/sawusafo.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/gurutajub.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0819afd08c84b72415e419f12de042ff/93606190368.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c3b7e27c2---4844426757.pdfIn PDF document text
    • https://labelmarket.pl/data/file/talisufatukado.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c81be5d15---62871238650.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/2694513530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=music+2000+ps1+romPDF 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_off000109ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109ED 10380 bytes
SHA-256: 12d14269e1226edd0ceb5653f1b9f14a439772e1e6235f92f67b151392e1b0a4
font_01_sfnt_off00012174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 18092 bytes
SHA-256: e5231f6db74deb91c92d21089ed92ac5ef902d0b0fd2a3e1cd0bc8850464fd6d
font_02_sfnt_off00015068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15068 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1