Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70e2fb0c33b4385…

MALICIOUS

PDF

97.2 KB Created: 2021-07-03 20:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2442382b19d74bcb4d72ff6b8b7d194d SHA-1: 320fb1a02e73de0b5036d6116e7d73d56f93c4a1 SHA-256: d70e2fb0c33b4385e3d71daddf4a07329f465564ab270da76408f81c0699b613
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and link farm behavior suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/d3b2b66e536fbfb5c28e373c1c143494/gatutewufizasosisotad.pdf In PDF document text
    • http://sanruou.com/app/webroot/uploads/files/66052454959.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c88aed0b1bf---diretatul.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/pirovigelojoratod.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/juzivixujisazozak.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/00007b07e9edcb4f388980198d959d86/28519193451.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///91794872635.pdfIn PDF document text
    • https://andrejc.si/files/file/80328799565.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5795a796b053c9738aa1b701537ea432/mularotirumulerekabukepe.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dea37a9d3---17616941951.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5ec5621d0---1431307091.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e2ef623a572cb7a96b037a3627832d5c/43866139223.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4da8de405---vijijesi.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/vobowazi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ab76c5e6382---40898931967.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/bajegipipud.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/69dcb3bd4d74289f81c1d7d6c64debb1/10224340392.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/batikeduzuxatepogaxovakil.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/67a93740cdf62e866abacb66e55db93a/65189497460.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5895d0435---vupos.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce0c4c499f---68293572548.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/1541454616.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160be97afcbdf4---87510849174.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+does+smut+meanPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 3000 bytes
SHA-256: 64e0c193e963b40e6ce4fc8b566f04ad4ef6533190f1eae570d823c8bf72c938
font_01_sfnt_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11055 21328 bytes
SHA-256: c7ac04a25ae06beafa870c3006964d4d01afc72a1af5d61f87c432c0dcdb5956
font_03_sfnt_off00014648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14648 16740 bytes
SHA-256: 18c90421a5cf02381c25abd051826b701785f2dfd31e5147223b8d88c561bead
font_04_sfnt_off00015e30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E30 10368 bytes
SHA-256: 82c21caa473f046b6d0269b85f61a7e5f7100d4adbf9eb901d0fd687dbc54a64

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