Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d9eff3be1b3d1a…

MALICIOUS

PDF

73.8 KB Created: 2021-09-04 20:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 61f64e31dc1d559b79716bf6116db429 SHA-1: ef63f76262cdd267d1fd7ffc742c71f3e23be837 SHA-256: 14d9eff3be1b3d1a69991a0b1d899462ad58b14b31663ad28434599c144f9c86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload directories, which in turn host other PDF files. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/2pre689lq3nvmoloe0ve31h48c/4985272514.pdf In PDF document text
    • http://maychamsocda.vn/images/userfiles/file/bujotidaxu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e346de251b---jusafukigoma.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae0c5c3ac---ligifobebevilu.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/382d2sttdi81jfaltmbsssq3df/32115323859.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/03fa5f8b812f94a6c85ef8a5b1b0f91b/21797424914.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/79827270625.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/zepixeresavojudol.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/mulenovanirugivudoso.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/bozovuwujexodewur.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/nitomukevepatawupa.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/13156068634.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/mulerudelulerofukefipunaf.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/bivovomalaturajidinek.pdfIn PDF document text
    • http://tcihk.com/userfiles/pesewotosifa.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/josepidukofadu.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/jofuxosavadebebamerij.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/46919006505.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/44776477835.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/v66pdpht6p9siq69votb29qgvm/80288150339.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5844c0664---solozu.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e860bf529b0---dinatom.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/39081577227.pdfIn PDF document text
    • http://agro-partner.com/Image/files/rukebanonosulopuxife.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/60800221121.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=99+names+of+allah+with+meaning+in+roman+english+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_off0000bd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 11100 bytes
SHA-256: d73ce412260e3c574c8fd501ea0bbb2c2b8c7827e6208d75dd08eb57fdccfda1
font_02_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 16504 bytes
SHA-256: 69ecf5e20a23e5c3de4ddc0b71a8eb421a139fc4476c63020f9de808d6af96db