Malicious PDF — malware analysis report

Static analysis result for SHA-256 06707111d1624c2b…

MALICIOUS

PDF

80.5 KB Created: 2021-10-08 20:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 59487dd0f811806d27ae25832f72af26 SHA-1: ce628dcc070f5adfb414d943cb9602d574ed8c26 SHA-256: 06707111d1624c2b9b4c2de1e9ea5cb9b5f80b74417b45659d7e7d13cbe039b2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the detection indicate it likely serves as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.thaitofu.com/image/upload/File/sozemivuverusaderugitug.pdf In PDF document text
    • http://rrbrentacars.com/files/others/fiboxibatoxamidodig.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/5c82c3043775b23c3168b4a66a2a22c8/26702640718.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210925070105_380319349.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/tomapi.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/48392fee6cf3d176913bef6104e58845/medibavaxetavojoj.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/94185384553.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155eccadbb43---xukubonojuzagukugerobor.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/57745933390.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e6ae6bc974162498203d9d670ee3dd67/nudesubegewojonemavupive.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909151045.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/lafuso.pdfIn PDF document text
    • https://mmtours.si/uploads/gabaturufosawoka.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/nadorosovi.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/jikedinerodur.pdfIn PDF document text
    • https://capecoralliving.com/media/file/tamudosorup.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210929_0FC2F99123CDAF47.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/76915994527.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16150f4cd103fd---76678116015.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/7104679037.pdfIn PDF document text
    • https://frenstravel.com/assets/ckfinder/userfiles/files/tokidamor.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/dinovadalegexe.pdfIn PDF document text
    • http://12shio5.com/contents/files/38269538388.pdfIn PDF document text
    • http://gskrem.ru/img/file/91062574662.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/dasaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=sixth+greek+letter+crossword+puzzle+cluePDF 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_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 17528 bytes
SHA-256: 75b120de91c6163c3ade718ca55c678e04ad4d26235286946d1ff61a6771b449
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 11044 bytes
SHA-256: 9c781ec1aab11588ba20e61a156edd78c0e41649ec7706c0f4c97438b4a46d92

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