Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a56a7f3ab9259b5…

MALICIOUS

PDF

73.4 KB Created: 2021-09-18 10:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9880be05032c35bb635f1c4ab92658c4 SHA-1: 642155493c0f62b5e4e5f2ebaaebf46e4c5ea3a0 SHA-256: 7a56a7f3ab9259b5493a950cc2abd37f37a93963deb6561e2e90604b2037f2b2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of these links and the overall structure strongly suggest an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://irlanc.ru/uplcv?utm_term=bangla+stylish+font+download+for+android PDF link annotation
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4258d8dfcf39620f1d166f0e4cd83d2a/91146179012.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613747e7c2de6---mijijoragowepan.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/15034500148.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/dezotaf.pdfIn PDF document text
    • https://supermovi.com/userfiles/files/80484829509.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613afad164ce5---mibet.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/43696403618.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/lamule.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109171726505121.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210917_748BD087A6B00E12.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/83196268755.pdfIn PDF document text
    • https://lenaoyunlar.net/calisma2/files/uploads/83444901736.pdfIn PDF document text
    • https://kolkataangikar.org/ckfinder/userfiles/files/febuledalamixaxini.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/rorewafunajudes.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/faritemepi.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16145752514ff6---26343276880.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e690a293e074e05f6457effcf4b07b89/79599026688.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a9c3b4039---32801000063.pdfIn PDF document text
    • http://cpils.com/userfiles/file/lutapiladipadokageweg.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/52975490363.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/xibudawibujupupoporoza.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/79192194648.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_off0000ba1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1D 17468 bytes
SHA-256: a8476bab58d203f6b234b7787528241a971e200bb54290fbb53252caa834401f
font_01_sfnt_off0000e728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 10752 bytes
SHA-256: 27d33ab90fd688f00e14382c867d7a87757366c45e3a04a8fbba22d62b0894d0
font_02_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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