Malicious PDF — malware analysis report

Static analysis result for SHA-256 5493a6fbe1d86b9c…

MALICIOUS

PDF

77.9 KB Created: 2021-09-02 01:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 83a75eb598fa6ff3b874b868754d9cab SHA-1: b7b7d43e96300a2315094cc20575c2e80417a11d SHA-256: 5493a6fbe1d86b9cea2925647182f660a5adf3956ed9872f5c88d334d5b7c18d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and other disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns that leverage compromised web infrastructure to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=the+snowman+christmas+tree PDF link annotation
    • http://vdi.vn/userfiles/file/9702499381.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8cba63f2a9c7dec7ea75045878008ad7/83954061058.pdfIn PDF document text
    • https://kristinanamaste.eu/files/jitixezejuxilogenakisi.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210902052423.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/13286888169.pdfIn PDF document text
    • https://hsse.cl/files/37767022170.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1148713d9b---kutido.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5715c909c---94619183850.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/joparawixo.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/86143004788.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/k4blv2nojnclc17cu4sotkri34/39132544004.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/govirufubuni.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/dimujimetojufana.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/v5kkm4n6itjpqb8kq90d6fsdjk/69564578342.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/17191030300.pdfIn PDF document text
    • https://moolans.com/uploads/files/fogukisixipalavovukutofeb.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/kubigipixemipavinepan.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/29030029393.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/gisalegirufus.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751bd5e5186---xebevojojoma.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/3971593028.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9b0604c8b---93052341830.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/pakataxom.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/64f065b4199a9e6176801a665df87d4f/pemiv.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vrph8bvbesqu0uerpqk4cf3gi2/fadasuvuxituwalekutosakop.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

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_off0000cae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE6 17408 bytes
SHA-256: 3657e0bbcb07ba8df7554d0a9bd06ae1812af3b64a5b6322c0b3ed5ac961ee9d
font_01_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 10496 bytes
SHA-256: 0ad74afb1d37d54c5ea6937dd3c3e11a9981f0b7994ea5ae73264c8417c4a35b

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