Malicious PDF — malware analysis report

Static analysis result for SHA-256 e804de2e83968b55…

MALICIOUS

PDF

84.1 KB Created: 2021-08-11 13:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a4030471e12cc649d18124d3b5eaa8b SHA-1: 38e91213f797351f60188cc10ce494efe7e7707f SHA-256: e804de2e83968b55c1b6b2eb339600a9cdb91fa647afb1dca12e5b490f7112eb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially harmful content or facilitating SEO manipulation through a network of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kopdesign.nl/userfiles/file/68895111129.pdf In PDF document text
    • http://tulga.ru/editor/files/tejopetabakizumubizimisi.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/72916567989.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3477d49e29---mimeboxabafikasozezegi.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/japojotinawexe.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//74454771845.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/327bf229fbd2e6186094b74c93ff2df9/94894372404.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/ligugememiji.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/perixakowozakezagolemojof.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce552d507b---wefojejawogovesesubi.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/71102612365.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1a9ae8bfc78e09d6e9aa27259a757f81/xuviridonokazefopakujamip.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/vudujumamomixokuxe.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/20481813047.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/feforonufatajeriginujokij.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8f2a4b00a---wujanefanujop.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/88ecca3609e4317ab53de47db8b775ec/kigosavegimavugonupuluk.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/motoxobenukonukuwoju.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/foluwabelaziwisipekip.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/23633563794.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/84024929543.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/zupixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+find+bluesoleil+serial+numberPDF 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_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 10832 bytes
SHA-256: f866821a0a3d5dfa1fb9cedb5f67b419a1be34bc9bd7df95f1639db679894763
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C8 16336 bytes
SHA-256: 86fc2b2144416c5b838479e119b8171dc70a567d3146a0247b72bf4eaa92bd8e

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