Malicious PDF — malware analysis report

Static analysis result for SHA-256 928927da15089f77…

MALICIOUS

PDF

187.2 KB Created: 2021-06-29 22:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b86420aa43235a987653465735e5423b SHA-1: ac493a7e5337a3166ee1b7f97edac2b3cc64f1d4 SHA-256: 928927da15089f7745845340902d40509d04972a02e92529fffc7d41d8ae7982
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or appear to be disposable. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these links suggests the document is designed to redirect users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9640

Heuristics 5

  • 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://dancedynamicsla.com/clients/38740/File/50010818554.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ecce671de---55159284656.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/wefakunotipulewovo.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/o0k5gruhuv72lndq1nfrov5rg6/zikes.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/nafogijaje.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/gsui9d5vdvdr0j7octoeae5h16/kapipowivumaderi.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/81402608154.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/42103821809.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0bb7b015e---lavagabagapejije.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/mugigalunu.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/memenidegilefat.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7frhc7847a17sonb7tl1ssdkq9/sexaz.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/liwudixomukelazetixad.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c44c035f76c---zomejiwadaligivonekewa.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/mofumawebakivonedava.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e5935b232---wiripuvarija.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/xukukuwuzenu.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/bujabusozineziwatuguma.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/7131464860.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/3hf0jm7av34h4dmfa7oto452h6/dutita.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/24149276136.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c18a48ab6---37806305906.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/2f6dd9edeb075fd9103ba03bd97e9ad3/zoronepebow.pdfIn PDF document text
    • http://promador.pl/userfiles/file/fovesumuwiladagox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=d%26d+points+of+exhaustionPDF 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_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 20156 bytes
SHA-256: e4a6f37a8221281aed4bd45e0c8dee01fb453c2b98ef9df748864d90e0516959
font_01_sfnt_off00013911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13911 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
font_02_sfnt_off00014baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAF 154432 bytes
SHA-256: 8fa5fa0393a8879cb522dbb46e5c0587a8a8621df1f2b9c0b9b5196a656403ad
font_03_sfnt_off0002c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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