Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebad48786a502c57…

MALICIOUS

PDF

84.7 KB Created: 2021-06-28 22:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 71be6c94382eb5f05001d8b0819b671d SHA-1: e54dc4c04174963ed21d2e9e6e2a432d68db8321 SHA-256: ebad48786a502c575a2083983ccc932b533d34f690a0aad5a3ceecec39dd675a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.rosabrockenhaus.ch/ckfinder/userfiles/files/rarifujawebuvesilew.pdf In PDF document text
    • http://alnoorcity.com/userfiles/file/54417921879.pdfIn PDF document text
    • https://afayl.com/userfiles/file/japujefu.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/5li2e8e4rtnu60pim89mb9idhi/modevidedopimosopex.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094b8ad76a1c---muxefiboxesa.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nfk15s959jc6eo2h4ogqo7f12a/kimunujifukilovavakolaj.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/zisuxawix.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/38871183936.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/53b240383cd52f0efdba0c3ac46d6d16/safexixi.pdfIn PDF document text
    • http://spiregene.com/image/files/20210626_071628.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/gbstjg68ekdrkgiusda0in3i5l/navikuxuperumolaxut.pdfIn PDF document text
    • http://aweibel.com/Photo/file/gikofuzebinerevipilajige.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e2b12362b3798a5897349a549cf474ea/9336980884.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/38sv2nfsquoavji5srn848vcq0/48643741370.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/da649bc28c6d6e8c5a663a3338e5501a/60152116234.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/ede3af5c1ec09a4a110243d719c8b503/ruzulu.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/nurujonivalubodobiz.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/486b690f8f6d2c1b09577b7d3837905d/fapatagififawoludavadog.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/67656041192.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160aa303f78e95---lakibimegudovewojux.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160756eee4fcca---81415135644.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/890151744adf4650cfd916a73d1eeb3a/90814906431.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/bc434ca4e6212895307ac2eb86d0a3ca/vexutibewezarulax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=driving+downhill+manual+transmissionPDF 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_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 16508 bytes
SHA-256: 416069eb92ce09f3d82b5c2b5bb56fb0298d3f733d8fbda7354171fe8be5fbb3
font_01_sfnt_off000114dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF3 10816 bytes
SHA-256: 7d41cdd9775267650683de9497e614055ca7fb1aa8a5e29cd17483a9e182614d

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