Malicious PDF — malware analysis report

Static analysis result for SHA-256 3570071d054f0e04…

MALICIOUS

PDF

85.7 KB Created: 2021-09-10 05:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88b5f60642ac03c84b77d61c5363b1f1 SHA-1: c00b59d2d51cb25e1eef6be8a878d2f7f4b49269 SHA-256: 3570071d054f0e045d901341c600845b3eb409210fb6158ee4e7b8d8816d9fab
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is part of a link farm designed to manipulate search engine results or distribute further malicious content via numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://pinedafoundation.org/imageuploads/file/59993527132.pdf In PDF document text
    • http://internet-trade.eu/UserFiles/file/68863031565.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/4252283584.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/36074578336.pdfIn PDF document text
    • http://esistore.be/userfiles/file/93665526500.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/pojiwav.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/zudojororulixorevibebepar.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/79327733537.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/91541949569.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/25911037391.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/90665489603.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/nekowitaxugalapeg.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/bixezidoligez.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/73640431081.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/wivewifigepagovijemo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16135385259a41---ximifewajisanezap.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/fazitupizebezovomilokizir.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132808dde704---tovixufiluzemena.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/tumubobokorupikuwadovepi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/widesunovazafi.pdfIn PDF document text
    • http://freewest.at/47285258226.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/fenamixafakolikuminapurun.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/vipokolebu.pdfIn PDF document text
    • http://teplospectr.ru/images/files/dafofisim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=nba+now+mobile+basketball+game+mod+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 10932 bytes
SHA-256: 06c4cfebf49406505d1cbd19584d239d0507763815dc4e57c4a4b2e6617b9a44
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 17408 bytes
SHA-256: 6629ac5e451b5aa64992b673faf1ef4e868e375ff004cdcf93d3f15ecec63f66
font_02_sfnt_off00013106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1