Malicious PDF — malware analysis report

Static analysis result for SHA-256 2def467316374fd6…

MALICIOUS

PDF

90.7 KB Created: 2021-07-15 10:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 892b9643e44c18a2cee47521c6aae50e SHA-1: 877fb5a9eb753204eb91be51fa07f28b1051389d SHA-256: 2def467316374fd6cc867baee243047bf36426a88f163fbd383c8d21a269517e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://kayapaliinsaat.net/file/sodokivexikatuzux.pdf In PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608701af7299b---gamevemigereros.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082241c1ac0e---xowufefibiw.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/32760027989.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ebe1583ac6f67e2ebb83488c60619b4a/40948104637.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kuxoponatosipelowumij.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/f43eif2bnnge8269j87nkg3ll1/bikasabunewubakulubot.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/jejawunubigarexafola.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7f3d822d14---23774788509.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/503ed53467e0ff42a8768d1abd55bcb6/96207772104.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/503eca4af9120174c6a880e03afb2b53/79854484920.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/94056538159.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/lasakofawofim.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/77533094828.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/83685768056.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/badivakasalapisijomoti.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/38871041603.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/53685802857.pdfIn PDF document text
    • http://bigandtallking.com/userfiles/file/13877817632.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160911fc9a6808---ririsupaze.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/3bdcae595434ff8292f3fb4206db8fab/89266367209.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///vebaj.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1bec941e---8057799728.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=the+hobbit+full+movie+tamil+dubbed+downloadPDF 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_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 10708 bytes
SHA-256: 25f8ee26d77451135dba851dabf5ee5e997d194d1f276430ce9deb73a6d412d0
font_01_sfnt_off000117e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E2 17616 bytes
SHA-256: 02367531a240a18293a6a2c306f9e8631b27bb04a998cea4a32bb19e0eacdc70
font_02_sfnt_off00014562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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