Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdf725b7f651a9f…

MALICIOUS

PDF

85.7 KB Created: 2021-08-15 16:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4f9d52084b1583803f707d169252e2f6 SHA-1: 5feba2980fdc1a7144a5c521d7c5863231797982 SHA-256: ccdf725b7f651a9fe61972b2db619718dcfe0942c7dd78a5ebb364980989c42c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of numerous external links strongly suggests an attempt to lure victims to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=how+to+report+root+cause+analysis PDF link annotation
    • http://ajtoablakcentrum.com/_user/file/nozopipizefawukilolafu.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/rafefiziguzukoj.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858653a32b2---59290964625.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/50e567cad5e2c69fe042c8c7562cb17f/sivipesit.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6a375c74b6---tupekofefaguluwebis.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/81953722055.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/89617953737.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/10610719339.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b682489656---98979175104.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814f87aa4af---73842649314.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/65227587083.pdfIn PDF document text
    • http://asid.rw/userfiles/file/vonuwudewu.pdfIn PDF document text
    • https://irantruck.ir/data/file/mutapod.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/85866415867.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/db6a4396f31dd804e03102a01901d444/wodaregigitadodevo.pdfIn PDF document text
    • https://citronel.com/userfiles/files/jikoja.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a4161130---7037481036.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8b802a49de1d28936537a5d0777b845b/87706669264.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8e57e1f87a---kukab.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/60779075390.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eaad9afdd---70411617957.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/gusudazixeluwuxezejolib.pdfIn PDF document text
    • https://dm288.rs/slicice/file/webukalodokuletelajefeno.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/mokinimerunus.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/ec7ca62ed76d1ec16f7434c0c851559e/28602232113.pdfIn PDF document text
    • 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_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 10656 bytes
SHA-256: 156e6dda75ff037330ada04e0981181801b9010f45efaf213008caca932998d0
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 16908 bytes
SHA-256: cdbd5d7639d52556ba815c4b421ac4788d8a28f5cec30c5ca5ebb1de8941ba94
font_02_sfnt_off00013000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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