Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d14b26837b3abfb…

MALICIOUS

PDF

99.1 KB Created: 2021-07-31 16:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0bb8dc473fba9166f6afba0ca7545fd1 SHA-1: 8a48620c6c654c24354675bf02a7a8bd127da245 SHA-256: 1d14b26837b3abfbb867f38ab4d1579759e3187c5c0f3b31327a0ff91d0a9da9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple domains, some of which are compromised CMS uploads or disposable hosting. The primary goal appears to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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://castel.ro/userfiles/file/sazilesebonexivozitoj.pdf In PDF document text
    • https://aspirans.com/files/file/reluda.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088d4e9aa3f3---60577648985.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/voliwibodilujupegajejas.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/17231189441.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/pifelokotadufakeniga.pdfIn PDF document text
    • http://pb-book.com/user_file/file/jovopilolopajubili.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f7433bfcc---kubilepupebizes.pdfIn PDF document text
    • http://inistor.com/ufiles/files/56548684286.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/nunozawuvujizede.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/91c2e6d1adfa9a39557f5d796915c7a9/65606091322.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/v658ikg4pr6gogdqkr1bn7ji7d/rakozadutozuxatitos.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/sogorag.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/lafuvidi.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5180438ea8ccf4d4fde0beeaa1dc51dd/lukaxadozagomutoda.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/21782103062.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ffda365c39d071c12be5de6ec3b97ed3/63756741645.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b48e35403---55344279870.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b778fa3b---wagogu.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31236164726.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/50042127236.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47d53e59ae---99254818902.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d30ac7e681---samedererupetoduvekugo.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/45821749102.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6510f7e3---767801632.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/83360832159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ghulam+t%C3%BCrk%C3%A7e+dublaj+izle+fullPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00015fde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15FDE 17896 bytes
SHA-256: 905e7f510150feab7fc18d029b71ccd22c3958cd558733b8d7121fcbaf53cecd
font_00_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 19960 bytes
SHA-256: b2e27d973b553275fd53fa0a6b323093ad3f743e8937ffed330d90e3262751ee
font_01_sfnt_off00012e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E07 11180 bytes
SHA-256: 77bc3e3168382d37fcf4b74abaaaa9c15bf75e018cafd80f721a7d1c3080fce4
font_02_sfnt_off000147cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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