Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e2ee0b32fd0808…

MALICIOUS

PDF

85.7 KB Created: 2021-08-19 08:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da29938e0a91adc98aa28cd9d30a46cb SHA-1: 4d7d174c086b405c24611744578f779c0dc843b2 SHA-256: d7e2ee0b32fd0808a2fd7e75becb44680bd63229ae9cdf8f34c4cd59ba43116d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, strongly suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://le-lemniscus-incandescent.fr/ckeditor/upload/files/49075810006.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c0be6e819---27434850573.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aca10fcde85---semawi.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/xafezezuroxiwabil.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/76106246480.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3e7f60929---7960459035.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/90267630424.pdfIn PDF document text
    • https://blogsma.com/files/lugafaxulunumaxez.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/51876259049.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/wukojiletikoxokoji.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/xunamuzu.pdfIn PDF document text
    • https://keongracun.org/contents//files/85853224826.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/3dba61c0588751ffeb52eacb08acc118/nesovivubalalajegipan.pdfIn PDF document text
    • https://ms02bet.com/contents//files/xezurejotoxotipikawipol.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/669985494234ccf91c522d7bbbe391d8/53401520808.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6fdb4a32e---raxiparufuboboge.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/moker.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/pofom.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/zoragokokuwokinu.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/66617653551.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a7becd048---junigelabutesijamupekudop.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf8ca50a05---56793636801.pdfIn PDF document text
    • https://petek.biz/resimler/files/mizilepejukedukutisilovo.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/37985713183.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210804/file/16280064388560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+calculate+area+of+irregular+trapezoidPDF 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_off0000e65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 18164 bytes
SHA-256: 4dfdcf003daa5f11d345a30675ab9b3ea1282ea90203c8fe94347599c30111a1
font_02_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 10760 bytes
SHA-256: 836ed35f2c70f5b7c44c6e025d0d04f39a94bded894dcfb5af6744f19a585607

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