Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ba01a345e1b0a8…

MALICIOUS

PDF

82.7 KB Created: 2021-09-04 10:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9ce522f845bdf26c67564dfac593eca0 SHA-1: 6840996f27ff0fb185be8d531417d8465bafaad0 SHA-256: e3ba01a345e1b0a8fa93f2c28876b3d5e0cc5040b19ba3ae26c873d232ff2824
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 websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://albatrossmrn.com/konadnew/userfiles/file/88667001333.pdf In PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a62d53e3d35ba81656d1c6016bccb4dd/wasovewitunulola.pdfIn PDF document text
    • https://nevisnews.com/userfiles/74115137938.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/69476176749.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075969c371ce---84834049577.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/30afb21bf0a2ce740ecfa4b514d77fa9/85962570159.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/xekolevatizijituma.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/niluripixebug.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/tajak.pdfIn PDF document text
    • http://accronline.com/userfiles/file/21029449354.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/visosaviforasonufuj.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/35594721942.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/76894679677.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/sgvrlqjhuhd6fr3gdfqc0nnsr1/besisudevunazemasuvojore.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/83792044480.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612cc29e58d6d---xazilowibigijivugipazo.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/75073211937.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/f47g7dlqo0b709il5mm4rqa1ct/gujavixewa.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a249a44c907---japajevilevosabu.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/jetad.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa57a55fe---20349919028.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/eef030bf636a51003bb6dec9ce126c22/kepafukuverapeko.pdfIn PDF document text
    • https://geniodelweb.com/file/xibusijavobixarefexaraf.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/finet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sap+application+lifecycle+management+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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 18656 bytes
SHA-256: 63b96a4ddc71f23f0bdf4ce1d9278f8118dbf87b089fab2f6d686865c05ef979
font_01_sfnt_off00010c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C02 10884 bytes
SHA-256: bb7ff6ea936a375c7020578eaeb00c61672e6169f92be63076e2021f2c7a1718
font_02_sfnt_off000124fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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