Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed098057e5b0332…

MALICIOUS

PDF

83.4 KB Created: 2021-09-18 06:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 02362a0da3c95971b4b22c21a202c5af SHA-1: 74320a12519de79575d50fe668dad74e5bd437e9 SHA-256: eed098057e5b0332a57f450177d5f80e4df538df6a217a751fdb1a26cc5c3699
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, presenting a link farm designed to trick users into downloading malicious files. The presence of multiple external URIs, including those hosted on compromised CMS platforms and disposable domains, strongly suggests a malicious intent to distribute malware. The ML classifier and ClamAV detection further corroborate the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=tekken+3+download+android+mobile PDF link annotation
    • http://synphabase.ch/upload/file/81807112518.pdfIn PDF document text
    • http://qlionshousing.ca/userfiles/file/rivalodexepolobewewepif.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/firelabafalulabikufu.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/lebosepifisanupug.pdfIn PDF document text
    • http://fitviewer.de/files/file/28923120056.pdfIn PDF document text
    • https://iwistw.com/upload/files/85299701600.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc91c3a88b---kojaxo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d10b9014b---petuxerofarulifataxaso.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/zetiratuvopirupiki.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/tajorafeloxuvoridudojube.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/50348335032.pdfIn PDF document text
    • http://gerocuki.hu/user/file/xujabidegowojedike.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/37003473180.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/25129951423.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f33a029a49d85e89a3d828197dac6aaa/zijezixurun.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/xeketupizuzogob.pdfIn PDF document text
    • https://jensbrode.de/files/file/89120945083.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/jekanepoxekowama.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/52196675430.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/53182112860.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/339912fc7021c4cebbeff551038452f1/3700028648.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/87388577934.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/51973616205.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/24817084095.pdfIn PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/nowapukutemipab.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_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 17108 bytes
SHA-256: f46d88ae570c41edb4459a20491193ebbc2978b8ed8826afd7e89dd9b4db653b
font_01_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 10596 bytes
SHA-256: 72c0e69a5d41b3ef49ad766a5f619f0a6f4cbc5cefb307d7322031532de237b4
font_02_sfnt_off0001275d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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