Malicious PDF — malware analysis report

Static analysis result for SHA-256 b00d0d19f54ad24d…

MALICIOUS

PDF

80.1 KB Created: 2021-09-01 14:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5239dde89bfd8058c3efce16f79694d SHA-1: 8b68b21493490edae2d704db186630a1c6fb2f5a SHA-256: b00d0d19f54ad24db477e6b87ad389d86147f750d1374f0d8cd210e5d2f52a92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, several of which are hosted on compromised CMS upload storage. The document body is heavily obfuscated and unreadable, suggesting it is designed to obscure its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e2a1b5e610e436f16289cdcc48a32072/35767641959.pdf In PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/duwedozuregakidokaretuli.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/30082179141.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160910978a252f---83716406512.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7f6035344---duzetanumetisofe.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/towipataguzugefofuvem.pdfIn PDF document text
    • https://brickzoo.it/file/15005317125.pdfIn PDF document text
    • http://acril.ru/ufiles/files/sepesibat.pdfIn PDF document text
    • https://ivaco.it/file/79054327123.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/nemuvo.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/53737181594.pdfIn PDF document text
    • http://tencanpowder.com/d/files/44147425713.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/31822734953.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/todozilodajorevofes.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/manoladotuwopesereti.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210803001052_xo9a0k.pdfIn PDF document text
    • https://service-panev.com/userfiles/ledesunupebenobovowede.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/97816722203.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e50c34c670---39243511092.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/33112820154.pdfIn PDF document text
    • https://sanxuattrucauthangkinh.com/Images_upload/files/gofewejep.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/20987044038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=heartsong+spay+and+neuter+clinicPDF 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_off0000d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 18628 bytes
SHA-256: 05561c21b1385e3f99776b7c7e3a13fdbc425096b1174ae4e1a900b83d89db7e
font_02_sfnt_off000119ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AD 10896 bytes
SHA-256: 43f204958557154f28aebb93f6325dc7c05405ac54ba9940926a5de63e4c471c