Malicious PDF — malware analysis report

Static analysis result for SHA-256 218fabbe7119a41a…

MALICIOUS

PDF

100.9 KB Created: 2021-06-29 16:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3dca7851c22148a93a7d115a374b4cc SHA-1: 78eaad66c189b90f8eb3c77fd5cb989655322da3 SHA-256: 218fabbe7119a41a65412d1c6fd28c7a0218ab2e63fb56b376926e3b86528649
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery through these linked sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/55a459926fba10f1e416bf2901d411e3/sewulojosukugafekujusobil.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/dcf1bfc8ffe95670b2caf208de553ab2/xisawuwuvarudupojetixu.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b1abff409f6---gugukipinejibil.pdf
    • http://workcoop.org/fckeditor/userimages/file/20210602174322.pdf
    • http://hoangle.vn/uploads/userfiles/file/kunixojalupileteno.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cba8b08776---21476356208.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8a0d568ec02b17f56fb323ce9940fb6b/valajifibudoxabofanokixu.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/299260d407113038aeacc5b0339b5d7b/nuresoj.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/e165025b613bf3c543fbd5bc7a6f07e3/lofadupafab.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/jafojel.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/qg1iatsbsdrnjkbltgjqcqbgoj/77553040508.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609855055c318---gexesixiluvidabi.pdf
    • https://ikima.fr/uploads/file/varopega.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d18704a328d3e8a886b8ffa537c0cb34/wujexavifu.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16092599b3d4a9---gisulatepabowo.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/2uq01a2q7l877egu7moj28v856/722908513.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/b1v3bjccd4vor3ej1bhpdebe4u/zidinanojejuwenijamur.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/664b9eb6888b8660fc1646051213042b/58634263044.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/083cded38866831263d71afe3f74b5e6/96182571176.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2075075b06---46638346643.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884e9dd1e76---27706585095.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/51cda57f1bd7cfa87b31a3b42d8a4fb9/wirafozuv.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/id30k9tktc969n43mch7cm3qpb/20256548331.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=what+does+ftp+mean+clothing
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012463.bin
df0ee8c6313b7fa4f3d8272faedbe512eb124e6304d1cab141175b814578e15c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12463 10960 bytes
font_01_sfnt_off00013d6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6F 16792 bytes
font_02_sfnt_off00015581.bin
1f39107c5770961baa38639b01f2ba787e1705ad80dcfc608eee72c7b83d7100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15581 17968 bytes

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