Malicious PDF — malware analysis report

Static analysis result for SHA-256 914fa0214748e403…

MALICIOUS

PDF

79.7 KB Created: 2021-09-18 03:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bc959282cb713f8d44ab81e9cab4946a SHA-1: 9b15835ebabd88c0e2c9e5e3366d04f3ad493194 SHA-256: 914fa0214748e4034b48fa49936e6731bb1e97f0f3ff3e5f4f377953d52f7206
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=joseph+campbell+the+power+of+myth+pdf PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/31200916027.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/terokasaworofoduzenun.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/98110809110.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/jinizisijumowunaxovof.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/32858058835.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161320f9010368---bolinir.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/jobuperikakewivimexafuma.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/gasitixigenabix.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c36705780---pigubozadigitijomuna.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/87894665467.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/fagonawidemexi.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/ce562bf2e67c8f708de3a1e935448c22/11934786595.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ad1cc6c607c3a9be9f37daf8aeedf58c/91430707988.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/linizezelesosidofinojasog.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/4162041320.pdfIn PDF document text
    • https://bagstyle.uz/images/file/15928534403.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/taxiwow.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/vefewajejuzubisavuzibi.pdfIn PDF document text
    • http://ahchala.com/img/file/74515523669.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/26828109466.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/35183498370.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/gitowekiputulara.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/35386795353.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/64616875212.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 17720 bytes
SHA-256: d2bdaf91dd79642768d92f1f60da593f3471d214bf3536f19bc780951f75234a
font_02_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 11020 bytes
SHA-256: 9a5bd25ddc53c13543b58371d6e6160a3ba9f0e16d03f6bc62719e04a2ad6fc2

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