Malicious PDF — malware analysis report

Static analysis result for SHA-256 001b7d4e13f734ad…

MALICIOUS

PDF

75.9 KB Created: 2021-09-15 20:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7191726d3e575cbf0845cdc617b956f SHA-1: 3626e3eb543bdd89af04a128039fd673c58c9ec5 SHA-256: 001b7d4e13f734ad0301be2b6a84e48f7b23e02f7b244e876e7d1b563d83162c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drtamerturan.com/file/19609110249.pdf In PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2qdnrlblbj6rj4cbdj4lg623i0/tixonedimimikap.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/37047167344.pdfIn PDF document text
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/17659915322.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/16717270515.pdfIn PDF document text
    • http://mehmetrasimmutlu.com/icerik/file/12973932786.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/40031290598.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/juzobopoxixamizalito.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/zupifupametiropadofat.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/19773049068.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613aab509e330---dunafewijemoneritaroje.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/wevelafuxoxibirof.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/xaxexidapikakitaw.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/lofekekozaxakavudi.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/50035049858.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/20770200412.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/79742974250.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161318d838c87a---lanubixo.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e7c86c01a---40335639158.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/xuxesidudukaf.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/13373641032.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/37870734282.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/sanavenidiwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=destinies+of+the+soul+dr+ludovic+pdfPDF 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_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 10724 bytes
SHA-256: 89c223d2b0cd60bc2be30665e7e053ac4777efdb0e61d8909ab216e86bb6f580
font_01_sfnt_off0000d6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F0 19440 bytes
SHA-256: 422a7769fc924bd11b09962d993cd3c76b3d313033ccdb61db069d5e660ceeab
font_02_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1