Malicious PDF — malware analysis report

Static analysis result for SHA-256 720fce4a0789cfd7…

MALICIOUS

PDF

99.1 KB Created: 2021-08-11 14:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 703276ba69b7eed5c82474f8af32f616 SHA-1: b4b391a29ee5df5aa2bdae1197e14c642a3454eb SHA-256: 720fce4a0789cfd751181b54877cddb74eed75c9a980ab138bb1936c986b384a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple unknown URLs points to a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b5f3b64c---12089319797.pdf In PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/tabewesafowowukobawa.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/5138298773.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161027d38f1b41---27605949015.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964485ad2fa---66828579539.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dbfa12c4b82---87552617021.pdfIn PDF document text
    • http://dzbnf.com/upload/file///71643385867.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/81296744065.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/16908164890.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/a050d410b1dfa909ec1e652d9e704f08/mapotalixigoganifazopuwoj.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/gamebenevopek.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/71870047249.pdfIn PDF document text
    • https://badoza.net/userfiles/file/66205905079.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-29/20210629030138579842.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/84940543026.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rtok7j7sjgg239obe5p3d10bm8/mapoxawawotijezi.pdfIn PDF document text
    • http://screen.by/images/file/nubomazowumoxijuf.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/posano.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160966a21940ee---pifazijali.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/jaxenifegupezevof.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/57422120633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=skam+belgium+season+1+episode+1+english+subtitles+123moviesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0D 17920 bytes
SHA-256: e8bf0ab7e2b94d4b3cc58590cabde096f988e15f5ad6e10afe716bbaecfc62f8
font_01_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 21552 bytes
SHA-256: 62f85baf32fc1feee1505aecfb5fc50e1b31029912c7a30bccfeed7ab18e9408
font_02_sfnt_off00014b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0D 11556 bytes
SHA-256: 8ba15ab45ff87cb1d49430837ac42dbaec0504b615ac658bcaadbb971a42b55c
font_03_sfnt_off000165f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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