Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d18a6f3b93f5414…

MALICIOUS

PDF

82.0 KB Created: 2021-09-22 12:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9be4c99ce566f1dc4f6f331b3e89038c SHA-1: c8909b1387a76eb9b363d4d9a487c24616530923 SHA-256: 9d18a6f3b93f54140ab6544806f38e451e2de3499330babf7dfc596a76d53afb
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable domains, including one hosted on 'admio.ru' and another on 'duproject.com'. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://duproject.com/uploadEditor/files/81457640187.pdf In PDF document text
    • https://ykitraders.com/UserFiles/file/17441351221.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149ff98cdbea---lasagumedewetafolesavof.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/93928775139.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/44075747140.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/zuxedupozoze.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/2453c90dc6d84fa06a698fa6dc8f2e53/kusirorutezuritavuwilepas.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614506efe091a---najidakipeduwelukelelomax.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1f4583a3a---rizaxafaluwuxeb.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/zosinena.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/sepuvuxegelodamorugusop.pdfIn PDF document text
    • https://envirotechindia.net/admin/userfiles/file/rofikusililusobatewusi.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/verararazeb.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/161466e25ca3db---31111509662.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/59457609866.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/79bhq90i4u2nmr59no0lqaojm2/ledifub.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/91035750106.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/zavakatobinowemikevem.pdfIn PDF document text
    • http://studiobonvino.com/userfiles/files/dosoboxalomot.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/39465904640.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/9736k8iusdfuc6lb3pof19701k/gizuwadoveme.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/magularufor.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qu1panrtmppmphapt4r1819gcc/82108886573.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=bowmasters+diamond+membership+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_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 10984 bytes
SHA-256: aa8fad74eb751821a66390073915a52a34089405451afcf7e16bd47a47f8738c
font_01_sfnt_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 17828 bytes
SHA-256: 8c1d06a4f8fe7f70097848cc14ef2aa549ed265f87ec1f1a500a84e65e74ef9d
font_02_sfnt_off00012206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12206 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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