Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9b00aebfd97aa9…

MALICIOUS

PDF

91.1 KB Created: 2021-09-17 12:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0bb17f8b15e37653962826e667f899fb SHA-1: 712948bb8c1adffd45f786a98e9fca107f540eb9 SHA-256: 6e9b00aebfd97aa9c1ed9b86f41d9f887f56ba76c9a1113b0de535e751437486
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://pixomot.ru/uplcv?utm_term=send+files+to+sd+card+android PDF link annotation
    • http://hpcad.pl/Upload/file/55239937915.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408bd34ced5---3150254278.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/josatenurobuwun.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddbc9aa7a3---zaponajowuxomaludekipuper.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/segowotosufavelorad.pdfIn PDF document text
    • http://berbun.com/user_img/file/85458552001.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/pibijepefamidu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141117c5b940---fuzelul.pdfIn PDF document text
    • https://polytex.de/sites/default/files/josabuvuga.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/76369090842.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-11/20210911134510593242.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/60173068997.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/46467601789.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/1sk86vq2glnkh3eqb6vc0g3nr3/41738201855.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/93169319365.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/runiviwirolitoka.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/83364063387.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/84157567589.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/sigisolizezepajuler.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/fisibutezodarazanarifume.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/64805415520.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/riwamuvijaxobajopelixis.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 25620 bytes
SHA-256: 3d242dbfc1543e66eaba0ba16554e09ed6ccf3016f9bfc6b6c981af5fe5075a4
font_02_sfnt_off0001274b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274B 10544 bytes
SHA-256: 3012d058cc9a921b31413e6a52374b4174cdb05f8a83017e766c789952835f69
font_03_sfnt_off00013f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F66 2128 bytes
SHA-256: 612cd5c70f487f82f128e08f6c1a101e52ba34f65993c4dc5bc4253f0511cf1b
font_04_sfnt_off000148fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FE 16124 bytes
SHA-256: 2c21ff3ceeb7a5749d3d52712a08aca31fcce6c6a030d08a19a294d8f4050a43

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