Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a817332b88a1916…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 03:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ca253a5f00a34bdeacffd2c405161acb SHA-1: e5f9c671446214a17c74187f7ebb494999cc13cf SHA-256: 1a817332b88a191602945dc9fdf777044daea3ada9b7934f341a50df4dfcf268
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. It functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://synerhu.ru/uplcv?utm_term=balayan+batangas+zip+code PDF link annotation
    • http://gniortho.com/files/Upload/file/88046368462.pdfIn PDF document text
    • http://e-sportis.com/images/upload/zeranaxa.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/48059642432.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/14440048117.pdfIn PDF document text
    • https://jck.ro/userfiles/file/feruliji.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/jovopegiga.pdfIn PDF document text
    • https://invest.pl/userfiles/file/31219145632.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/ruxasuf.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2c799640d0f13033ac0f23eb5206660d/berarikug.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///laxavizajavuw.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309330ee18e---kamevasarexafiwotujajo.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/wokunibogusogabelenelozir.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/fupakerokaxobisaburexope.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387f7ce83bd---felepiwopanazudoratumewij.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/82149918812.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/44035604301.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/93362170965.pdfIn PDF document text
    • http://www.depomatrial.com/file/raxuxulakibijek.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/83750233832.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143b682503b2---12555376640.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/rurugalepodemob.pdfIn PDF document text
    • http://resurrection-life.net/userfiles/files/91250826781.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/86563925777.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/zenesudoxuju.pdfIn PDF document text
    • https://kermanrooz.com/img/files/zamesapapurip.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_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 17836 bytes
SHA-256: 6c4f19d78614eacb6029f071c81f946f55f16a880559ea390e4df32487b549e7
font_01_sfnt_off00010f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 10956 bytes
SHA-256: c4082f26fb5ef2495882e6c3d824df688ca03a6f7cdd5f4352663251af3695db
font_02_sfnt_off000128dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.