Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ebbd1430194ed3…

MALICIOUS

PDF

97.8 KB Created: 2021-06-29 03:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 44e1372a2574437f6d0600a442ea9ed5 SHA-1: ae43df197bd680dd46b90fde43a3588eab57745a SHA-256: d9ebbd1430194ed3a0b4409fc5d01e869d11a601a7ba5d92a2a86c1d6d1b5c2a
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, many hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are typical of malicious PDFs designed to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://przychodnia-felinskiego.pl/uploads/editor/file/10241175088.pdf In PDF document text
    • https://broadcasthub.com/ci/userfiles/files/firozaxewazekowedorulepum.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5ba5432a2a9f924609c3ebd11bb88374/mumuwimigemupe.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1622811869.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160701c23adf96---valasukami.pdfIn PDF document text
    • http://goref.ru/files/file/jejakekutu.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/40bdbd8c39b477c16ac81f46f4b0b724/19245098979.pdfIn PDF document text
    • https://digireg.it/upload/40419700574.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b6f9685eb---40507814935.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080311354c34---jisizujixuboziwaxigagari.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/e016ed4e31979da68ffebf23677d6f8d/rudamukexi.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/b8e7f2280d0965e64191a2d3af8312b7/wexujojupezowetedipof.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a98da067934---6385254966.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/674d97e355599cd739eda239922d78a4/bitezusukaf.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/a4d56866ffd71da611c5aff88e787645/27239478482.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rtok7j7sjgg239obe5p3d10bm8/mapoxawawotijezi.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f3e992da1---89006770351.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16249022239896.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/a20fc2b66b864021223e22fa2f11a834/fowawogonodozuladanajo.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/9d2bd9ee1ba0012415d5b815a156ab81/22776089276.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/90878516754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=normal+distribution+cdfPDF 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_off000112f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F4 20592 bytes
SHA-256: 56dc9852d954c8a50d6d2b4afdb5e1bb2ab1ee76511ff7e94bbe1f364a37aae7
font_01_sfnt_off000149b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B0 10720 bytes
SHA-256: cbe7faf74ec8cf9ff32d8cabbd3e3719fa09ee3c989abe7c764e4faef24d0028
font_02_sfnt_off00016240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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