Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbb24663ebbfded…

MALICIOUS

PDF

89.9 KB Created: 2021-07-31 08:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1b6a8c7939c2353d1f1bcfb4d1b3b741 SHA-1: 4956f5616d4d15f186a9e8d10bf69cbb312a23cb SHA-256: 6dbb24663ebbfded1546df4d08456499b31c8b38a6be76aa057e00e57c62fd08
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many of which are hosted on compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external links suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://agiusfuneraldirectors.com/files/file/nomapinatigixipaba.pdf In PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/27371182986.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/gozagelomuxet.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/novefoliwuni.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/5d88d7b7b6ddde783755c8823f1142c1/38765007203.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/85467539510.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/e2shauam5vumjtv86bikrh756m/10188915446.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/rapejobatinilojugibadokap.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/xujegolemopekageminafome.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/5jt39n18mj4vklpj6nmobsf322/nitek.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bafv3pkgnb3otgrmdms1dbdo2a/9221513414.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4e4c27968---39966690045.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074526666450---bevazaledibo.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c518bc0aa3d---4684008715.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210503210509.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/samur.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccbcf09572---33390481854.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d6edaed2888ddbed4d5ac871f9f53a04/korebuniditupevekujawox.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/dumosuguba.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/fefirofane.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210720_4F80A4C232C38501.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/43237704819.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0e958820---39268725133.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/4024696208.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/zusuvikegofapeparane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+draw+boy+hair+step+by+step+for+beginnersPDF 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
font_00_sfnt_off0000f419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF419 16568 bytes
SHA-256: 44decd54b54f5f9ce7770c42f8949dc6ec40af782cb0e271395e3a6e120c8a5d
font_01_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 11060 bytes
SHA-256: f44f0b626794591b7103edf9e798559d3616779532e1b71806ee537a074b8182
font_02_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15048 1756 bytes
SHA-256: f8927680f88d124c6c5cfbeef6e113f3efbc68aae03ca4931fd4ea66e39fe101