Malicious PDF — malware analysis report

Static analysis result for SHA-256 1312a7f7294f2d80…

MALICIOUS

PDF

84.3 KB Created: 2021-07-29 18:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d69bbe565ddff8ad44444f645815bfdd SHA-1: dcded130b0647659f964c8041e25debccd3ce22c SHA-256: 1312a7f7294f2d80fba2d54b4566b5fad63f24244c244d55499bbf0284fd8ebe
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/d5e65f2aeddb58b430976d944cceb40d/polinok.pdf In PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cb05738718d---rimerore.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaaaf01573---mebasozarimewafufavagomoz.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/54705142258.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160aadd311bfee---pasanipazudabenisopivu.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84072ed8c7---peratewepimagilakomerik.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021070708363983.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/d477ed23a6e04713a86872da5fce31c9/wilafotikaduzugadiwebomi.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094afe94bbb3---xonemizarirowutikobilelus.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/13865158110.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b891b16ff3d---41484567690.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/kidonanexupuwumekaxubir.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a737963b1f4---69052101331.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf97997124---bavizutesotajafurekiki.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rrl78ou9ef9fhodg3qtids82v1/24490978901.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/nemuxusilapalex.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8050045dea187f13eb94dfdaca42accc/nijosikoxizivabas.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/41336885679.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7af37ed3c24dd1b3e331c5763e44c09d/92405247761.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/26967595223.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/mafoginiwixapilatixemud.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/3e18eba22d0a296793303ab57bbf2eed/jaxozorudodenupadorade.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/ba052f7d0b1f57e69c2a859711ea6b59/30312387760.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/vowov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=caracteristicas+del+movimiento+circular+uniforme+variadoPDF 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_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA73 18108 bytes
SHA-256: f4adefee077b04aa368df3ca16b8d73a8fa4accb673568f5edc6defd3c5b68c4
font_02_sfnt_off0001297b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 10836 bytes
SHA-256: 30f03fd606237647a4d2dde034f9cfbfe4f9a7ace085eb77f64cab5fe97c8f47

Open this report in the interactive analyzer, or submit your own file for analysis.