Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bbb61c76dbd92f…

MALICIOUS

PDF

82.4 KB Created: 2021-06-27 10:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c24056fea2a8ae9b597cdab43c48c27d SHA-1: 3528af7ab9b6837510e3b92f0c2bc1c6f172ae14 SHA-256: d0bbb61c76dbd92f30f88028b5f24121345f59a2bfb52f7cd50d1840e610112d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous websites, many hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document body is unreadable, but the heuristics and URLs suggest a malicious link farm designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://alfavit.tv/userfiles/file/tevinofowalezabes.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/sldpofuiv1d01kjigkktu9r5ch/49551037654.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/34410115930.pdf
    • https://llsindia.in/FCKeditor/file/pesuxemanajibitiwifisovol.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/tuun63povdk292eqghm7r14su7/11681085069.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/17ff4f7fa7c73a67cc021d2bb93f8da6/70217986373.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a59776718---xozivuxojowe.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd626f1794---punelalabole.pdf
    • http://seoulsquare.com/userfiles/file/detekur.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b487d33684e---63285085148.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/5ktqqg8v1nf70v075l65orir43/20327548036.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/8d8bodv1n9kof8o5ofrr10e4r3/dubademozo.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160864e2fded36---29768098248.pdf
    • http://lezeckastenakosice.sk/upload/files/83973116936.pdf
    • http://www.bash.cl/media/file/37316455596.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a5247090a---xijupipajeku.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b27e274fd3beb913fd4ab02564a566a7/72550529932.pdf
    • http://ahkjt.com/upfile/file/dabixafigilako.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/ab0b437f8ccfd9271fdbd5a85f53ca96/pofokokofuvinixi.pdf
    • http://fittbikese.hu/files/file/67259177130.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f87538b9a1---fukago.pdf
    • http://marcelponjee.nl/ponjeefiles/file/mokepadusunivelagobuzanif.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcb8bcbbc3---nabikimimevitigit.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aa519d9ef---12592985702.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c24a573d2---beponukukaj.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/biviwetasen.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/a66e0d419e9d879456f930397fd6ccdf/gurapigexu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=erin+moriarty+red+widow
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd97.bin
e0299d6a02059b0f1378379e4f7f661d7abd84f3673fae00c2c900c9e8fe212e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD97 18032 bytes
font_01_sfnt_off00010c59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 16792 bytes
font_02_sfnt_off00012470.bin
cd41874c9f8210c6e2aab3d855c54049005ef8249f5e99d00f458b81cad4c680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 10380 bytes

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