Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afdc9730a4db563…

MALICIOUS

PDF

104.3 KB Created: 2021-07-22 14:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9add0313968b4de6ce6b927fc902cd55 SHA-1: 77aecea928fd0ec09cdb6feb617d4156b308d749 SHA-256: 5afdc9730a4db563f4dc6d2b97e9d712e1b28238259104e3ce7272c8d1f51790
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and disposable domains. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1352757c3---zixufabejazavokojenamat.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/409fe55ae3e0676cddb1b37023f1c8ca/14520896367.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/64326726459.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/22f68e1b567a0cab72e4252ff012e7de/2100638925.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/28320057907.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3a246f3de---86309167084.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ae08aaad27b79d57f7c44da7122286d9/mumubol.pdfIn PDF document text
    • http://seamacros.com/upload/file/26827713481.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb57f57878---movawezuferawebuw.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/28372611310.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/6fb4557be5fea74ac0788d07167b5659/36263706857.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1ff27e42---87907202520.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/zawujowojexi.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/tesuxunijumab.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/nupakosidovitopawobinufev.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a5de50e8b---giduleloxopiwuzetenili.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/kikitipatomuxejir.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/pegavosonasuvilibobobo.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/sgbqn252nt22nj57bmd9799im3/figebamadufuludalel.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/taxumujupuwada.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/ginadefok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=agile+use+case+examplesPDF 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_off0001354e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D60 18052 bytes
SHA-256: 79373fd72875840f2aaba44bfe61cce1e6cf91829ba15e9b5f622839a2c350a8
font_02_sfnt_off00017c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C36 10480 bytes
SHA-256: d47b754f2074ecdfc04d291bf6a603f739fb24370a7ce87b8203e575657f58ec

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