Malicious PDF — malware analysis report

Static analysis result for SHA-256 60014598d97d6760…

MALICIOUS

PDF

77.3 KB Created: 2021-09-07 16:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 83d1756ff7fe5e3b4a4a5b08c5bcd315 SHA-1: 749412524df0520ad31a1303cf49ea3afa2d12cf SHA-256: 60014598d97d6760773ee44c46f51f7e5d1c8690d3cb58506ee5b3d07e1c4db9
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 compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or exploit kits via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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.dean-cpa.com/files/adminpic/file/bunazoguruzijarafuxow.pdf In PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608354ecd4aef---77282550000.pdfIn PDF document text
    • http://accu-chek-event.com/ckupload/files/kasom.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/075c7f17b731ae01fb37c16951fd2397/46128170848.pdfIn PDF document text
    • http://4darchitecture.org/img/all/22614493792.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/78395224152.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/40068488970.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/kurafala.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/gekuzigumukepenunolu.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/1fb529c6481524b17f0c8340a4c51e25/54406764538.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b634e05bb6---45294683630.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021826149537864.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/vavirakilomatidenag.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609237e996df0---44683808479.pdfIn PDF document text
    • http://effektfilm.de/files/file/35904740868.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c6f49719cf9e4d6d61f71a0191d670f6/76347781364.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/oqmvhsnu06mfgepmc6a2ugvad0/25714233075.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/0ct92n4h9rdtuonhhvkturnqdk/nazowake.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ef5b87e1---xewadaxorefalidizutewadi.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/769082d133b4d5b359d1282e6eb27d58/88503488006.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/lupemipowoxejojelu.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161066d675d851---ripasijesigojakanaz.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/tezikawagabisod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=zhiyun+crane+v1+manualPDF link annotation
    • http://irodori.kir.jp/files/file/27400682982.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 10404 bytes
SHA-256: c0129c5f801469219d61579b693aed5a703dcfe6a7b1f5f5328a45febddf9c20
font_02_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426
font_03_sfnt_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 17828 bytes
SHA-256: cc1fc8d23d105e6e42052887edd77a3b68a57f8f59e63e70f496bef40a3b66f9