Malicious PDF — malware analysis report

Static analysis result for SHA-256 599d917bae90a013…

MALICIOUS

PDF

101.0 KB Created: 2021-07-07 20:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e3379314a39cfb5e3f08add6d11cd4c9 SHA-1: c39dc7a701655efec52ba731705c268db40a1657 SHA-256: 599d917bae90a0136d727369865be6dc5a11fd5818bec43b9a1a1b5b99c843e1
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal the PDF acts as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/462c233ada707aa699ae023568a37306/nulikofagebofepavanim.pdf In PDF document text
    • http://gptools.net/userfiles/file/87222452141.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/a1bcc98accebd4e644c94bbf46a9ee7a/mizotizategegiwomu.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e4139bef5f25b867a64328bcb9254d4d/30328749475.pdfIn PDF document text
    • http://gyobel.itpublic/file/jasoxavusajume.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/gikixoj.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef2551b31---wuloginawisuwasuri.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/e5c6faae6d9658185fd16476852731fe/42902091470.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/sarolofefigodokit.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/79e576d06ffea3f33ca145ecee8f13f7/93815438123.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5tsl077gno6lfql511bab52qtg/57138613150.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e5c620197---90620640759.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/giwizepefekokiwuguralo.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb98acc778---kodogenodiru.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c255919e---jejosememubuxogenetariwa.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/baropiwekisirosu.pdfIn PDF document text
    • https://digireg.org/upload/91135766526.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/18993062141.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/5e27d215b59a89bf3e5e95b90737ae6c/jewek.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/59e567fe70f8a357a1363f4ab55e8ee5/7311669442.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/nk1vhm0cob43iop8rtgl24rva1/nofirajonabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=cool+words+for+instagramPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001293f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293F 10684 bytes
SHA-256: f73fa1362143e2cb27d11a185dc9f67f25906521c60e7d1392566f3f11a98ce4
font_01_sfnt_off00014186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14186 17392 bytes
SHA-256: 4d1a12e37c257b1b7d4e271e964bcf6fa551787091ad561ed31f11e283141120
font_02_sfnt_off00016f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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