Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b000d94153123e…

MALICIOUS

PDF

94.5 KB Created: 2021-08-11 00:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e1a26d9744e3d33e9626f0e93db126f0 SHA-1: 50a48356ca5a530bd7d1e0326c092ea4c94c510d SHA-256: e9b000d94153123e8e612e0a5208415a28a28d53f27c3b8cf5d269886f57b93d
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or downloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, suggesting it's designed to trick users into downloading or executing harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://ukrainski-rosyjski.pl/userfiles/file/19061145256.pdf In PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92652565989.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/22440046897.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a3e2c6c1---nikuvojipufolowud.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5dc3b355---79406667741.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wejonadamoruxuzis.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/hhk7oa3en2bkfs5vghp9m8tlh6/fonavemix.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5d5d55a8---90865964823.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/16415577860.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/02846c26c8a1a5061a7044cb979cc921/vifeparabesufudotuto.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/98320461711.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jeputatafixodinuferal.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/xemexogofosinenide.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/56336868124.pdfIn PDF document text
    • https://lesura.net/userfiles/file/22636097480.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/23aa75a02d5bc9b48a4e4648c6088607/46654886583.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606cbd7897d9f---jujupesipekufowedipumoz.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d9ea8f22cf8efeb279deb3668bf0fec5/37678455268.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085269f9f481---kemapodozonobupokepobog.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/94914769692.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/zunojepipatusiziwaku.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/410674501.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160972a20963ab---26746513222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=8+ball+pool+mod+menu+apk+5.2.3PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f36e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF36E 17204 bytes
SHA-256: 849d4d3a9cb901fa918e1acf8608a3583f85a6ee8fe2525cf0212b7b05d06479
font_01_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12536 11032 bytes
SHA-256: ec4db14f0f4587ccb445da98833461d522ef1e7c003a4df4aa4522af1d9fba8a
font_03_sfnt_off00013ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA6 17528 bytes
SHA-256: 644f9e2f26c2fe76630aedab66d63d9ccba689dc81873e80fd9bab72ba443436

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