Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee9c2c49ed7cc5f…

MALICIOUS

PDF

92.0 KB Created: 2021-07-07 09:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 662d8679b8fff9be5f77cf08d795755e SHA-1: 5e73ea2e1e9d0563eab3ab503c29edd1dfcbf71d SHA-256: fee9c2c49ed7cc5fdfa92d871f87ec46a7c940f97a6e43dcb79a1dd75d55904a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many pointing to compromised WordPress installations, suggesting a link farm or SEO poisoning tactic. The presence of these links indicates an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution strategies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://drafthe.ru/uplcv?utm_term=elevated+red+blood+cells+and+platelets PDF link annotation
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d68eccf830---pedokobeti.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/danofarezobadojepogi.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/61917254821.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/74396387821.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/hi4samg70gn6131j8ebhpuells/4119557067.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9983dde2e---faxetujuranezewemu.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/6931dd74e02e4e6b69c42d6796c3b8eb/18733990024.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/papozotoxesona.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/db6657b1616f95bad0ebc299aa7363ed/raretufuz.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/letofirijufodinenukid.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/cp5bqetakt5j8j4hmhk0n2e71f/pawono.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c2fd3993---fexiwinanomodubar.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46d39d01c0---56491841302.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/c6bdfb554d8cab3180958681bab34858/87500515102.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/xorewekebo.pdfIn PDF document text
    • http://contelex.it/userfiles/files/xivefipa.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/68001882754.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/vp5lb1emf612nuifh9v5ejcaie/27327880867.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a3f9c438---kekigutoxezesokajamopikab.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/8hdl491nmf1mslaqq98v1so6qg/vijok.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/subigodan.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/2e693ea0056977052e95f4f8244a0382/15311984844.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/ninofukubo.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085edb116860---82215974439.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_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 16764 bytes
SHA-256: c2dba8bb318bb0b6c576fe10b5af4c2365e3ed04dd0affd43effc6409844ecc0
font_02_sfnt_off00014a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A62 10604 bytes
SHA-256: 491d3ab21b028b7923261d733e2c42d9716fb59777d1d7651b62c64d4250231c

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