Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2be6e0cc58b1c53…

MALICIOUS

PDF

78.5 KB Created: 2021-07-06 02:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cbb5721e06324b427aaf394429ae5e50 SHA-1: 21156229e301d76d7845431d25c975ba1460fea1 SHA-256: b2be6e0cc58b1c53a2c2270e2b308382db969b6b43fb7f3bbd353072b8dacd76
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. The presence of multiple compromised CMS upload links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://ketchas.ru/uplcv?utm_term=determine+the+indicated+probability+for+a+binomial+experiment+with+the+given+number+of+trials PDF link annotation
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f29d5eab0bf7a632673686840c8fc323/44791288401.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/52504003007.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/bobefebapuwoxidapuworofet.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cd5578ef94c1ad68638880e08e1535a4/48884247356.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/178438b2a82062d2beba0e1e1105452e/wujewobawezidon.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/92023417840fce10dd61382cea723487/96371331403.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/v4kg28oppa8n78e6h60r360mil/44919425527.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/jivolatonobowebeba.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/sfnco38dd1k8fac8oimurog2t3/kitunakabowipa.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/652d4405f687e1c9fd4a6f9144f99e24/razopogipawedubelibewinos.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/8999332812.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609264855afe6---29763496247.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/53166498413.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb1bc35ff8---68256162714.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/gekememolewezawiwoxopu.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/62961518863.pdfIn PDF document text
    • http://worldwidefilipinoalliance.com/uploadedFiles/files/87565716876.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/nuzulefurabularadiwuka.pdfIn PDF document text
    • https://afayl.com/userfiles/file/26620417118.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/duqgjtho2da808u0dek4lld3jo/37082574430.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a8853c7ba365933ed9a211eda5e7d9a/risajuxefuzawapezuxokob.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/n8seb3juavdrabv52jht7vaa7v/70685192406.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971b6e5e70b---9183571923.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/95059176201.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/fhgjtsnbisfa81edlrdbbd7e46/60897410278.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf76b3bb9e---34572238885.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085937902a71---53257012233.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/37307907138.pdfIn PDF document text
    • 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_off0000cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 11676 bytes
SHA-256: 84245a90ce3ba1d390dcf48a84789dfedb615315364cdf6f3087793986ce7788
font_01_sfnt_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 16520 bytes
SHA-256: 28c241a5c32115dcfda35a129def26d62ce9405886a366150059a955aa79ce3d

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