Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daa32d64db8072a…

MALICIOUS

PDF

76.2 KB Created: 2021-09-04 20:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1a1d238cbc5ca10be0e37e0dd5bd223b SHA-1: 29a5d0a555f843dd73c2d85173b1c016269da4da SHA-256: 9daa32d64db8072ac4594508fe9fd7a538beebc61fb94e594353e42a1ca62f17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS upload storage or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=elapsed+time+grade+3+worksheets PDF link annotation
    • http://smn1970.com/clients/d/d4/d44d2684521ac238e4bdef02d06179b0/File/patebojafabi.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/14306686794.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0727cb8f9---beluvomupal.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/rawufogipituxorivupanuvuz.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/18518031224.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc997152c---mujifimal.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/velutikefamudovabeneloze.pdfIn PDF document text
    • https://argumentua.com/i/file/94896399495.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b7c2287bc6b0535a7c093f11aef670b0/fuzudug.pdfIn PDF document text
    • https://drsaman.com/files/63771346598.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/41767986915.pdfIn PDF document text
    • http://vecsecity.info/editor_up/kexosatukube.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/sivizibulufapubopu.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/juzazesasadok.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9e34631a6---66478484201.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/xakuzikibujexin.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/bigudodoba.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/92513940210.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/pekozuzenolepevobamelo.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a581ded3b7---97523091828.pdfIn PDF document text
    • http://satthachkhe.vn/image/file/83343198074.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/24022932885.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b325cf188---pafafomedenisip.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_off0000c60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60D 11068 bytes
SHA-256: d14f4af7c152fe60b70cb46f256abdefe31769ecb9f741d30ac866738ab1ebfd
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 17080 bytes
SHA-256: 7f68e9d49bf0d1bfed8b5715105e2284ff2a1012991c5ac63108f8ec16da77b5
font_02_sfnt_off00010b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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