Malicious PDF — malware analysis report

Static analysis result for SHA-256 0364953bed6d4c3c…

MALICIOUS

PDF

84.7 KB Created: 2021-09-17 08:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9ff92005a14af060a7102f32acc9c290 SHA-1: 6bf593f7a0f7c119326926b04a5e0c15a24f2889 SHA-256: 0364953bed6d4c3c22041db8fe5d8327a637bcc9d4e555938315232f30f2c5de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown-reputation URLs suggest a link farm designed to host further malicious content or phishing pages. The ClamAV detection and ML classifier output strongly support a malicious classification, likely related to phishing or malware distribution.

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
  • 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
  • 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://laborke.ru/uplcv?utm_term=qr+codes+for+beyblade+stadium PDF link annotation
    • http://timecraftz.com/userfiles/file/96206809620.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/58826585901.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/19994468094.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/gopopupijifozobile.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/45958118926.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/27126643696.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/modixakudobisujebijufi.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/51848476418.pdfIn PDF document text
    • http://spiregene.com/image/files/20210904_135014.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vdrf1s3nttt38lfhqq7ft7ivlr/verenojufazobaluborilefi.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/titunujabawafu.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/dujogelozafikuruxi.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-7/20210907002117428020.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/49322612142.pdfIn PDF document text
    • http://ilonew.tasksplan.com/ckfinder/userfiles/files/29387140103.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/55462250167.pdfIn PDF document text
    • http://learningkey.org/userfiles/guwafabotatuxu.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/90938736242.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/fifibex.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/15594091805.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-9-16/20210916141931697353.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/suvesemetabofutexaseg.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210907165516065326agp43o.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/9902615019.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zotididutobunagifefajilug.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_off0000e4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 10948 bytes
SHA-256: ac78f51c84ad75fef25c0e10a154386f6a8c3b2c0d1ef40c786a809712b47bb7
font_02_sfnt_off00011655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11655 17744 bytes
SHA-256: 72205919d95ec88ffc2c1f03485ec2345e5596347ec10db7d40e05f91adafafb