Malicious PDF — malware analysis report

Static analysis result for SHA-256 805e75beb6db9db7…

MALICIOUS

PDF

70.2 KB Created: 2021-08-29 06:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 80cf4983de625619fbc1d47ff8781182 SHA-1: 93371d2d0a906e7942a974cb47e41d1353ae59d1 SHA-256: 805e75beb6db9db72ac12568adb9c50256b9b131f232ada59176d12228ea0178
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm designed to redirect users. The presence of these link farms and the use of compromised hosting are common tactics for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/18ffee6b188beb71cd164a274ca79459/36351156451.pdf In PDF document text
    • https://khabul.mn/mmpa/userfiles/files/98656483654.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/65918511142.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/1052404162.pdfIn PDF document text
    • https://nevisnews.com/userfiles/pilujafolajapipipited.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708645aaa82---kezen.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/31101841280.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a9806a615d0---befapirowefodopofi.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/makelobitenujutajijamesu.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/kuzapavusoro.pdfIn PDF document text
    • https://cubic.is/userfiles/file/90310657186.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/a09f7dadfd521910f7864b7dcd52ace6/73966230677.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a1bce779b944c939bd789a3cc4d2a161/pijox.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfd84e37b4---53880007384.pdfIn PDF document text
    • http://ledins.lv/cms/file/20152099144.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/37398977136.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/forerebizujafaxamuvenige.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/89156700059.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4478653b61---doronigi.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/8258579737.pdfIn PDF document text
    • http://remobudostol.pl/pliki/17190259141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ulike+class+10+social+science+pdf+downloadPDF 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_off0000b439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC50 10776 bytes
SHA-256: 162123abe652bc4d378f2d21879f134de09d48ab935a971720cc0daa8709e037
font_02_sfnt_off0000e549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 14880 bytes
SHA-256: 3043859222ebcd49ddcd8b1e87cc08719bba366a6ec5a3cc9698e8335addef8a

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