Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f94e1dc54b89ecc…

MALICIOUS

PDF

73.3 KB Created: 2021-09-22 11:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ded284fc3fc4a83a981735114c31fefc SHA-1: d7c1429ab90e846894f473e756272564254badbc SHA-256: 9f94e1dc54b89eccab4b3b76abe311164c2f18bea729c27180a1588ce3d1842d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as a phishing trojan. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of JavaScript indicates potential for further malicious actions, such as downloading additional payloads or exploiting browser vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://telegid.tv/userfiles/files/53711989504.pdf In PDF document text
    • http://jenan.com/ckfinder/userfiles/files/nojofaxosugewivad.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149813e2a20a---24713578788.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/zagulodolivulevu.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/99373905829.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614acc1be33b0---waviwarejodifatutufu.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/70175407336.pdfIn PDF document text
    • http://agro-partner.com/Image/files/59039743872.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/felen.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/949a78e4d1f61019f489572465c7afc4/68640144699.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/janoranuxixabuzexeva.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/29796039818.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/62593127395.pdfIn PDF document text
    • http://etnorom.hu/pictures/rumuwuvudizijebagositopal.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/lijudup.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/47861ehv8ictfap97g8feef6u1/64008024755.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/sesezosezafeloro.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/vuruduzuwikunutuwanekuvad.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7fbf23aaf---salotevezukuwon.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/kokugafewerosaj.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/95069110942.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/lelorovutobenogizax.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c2927c247---kerozamojomenamov.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/65172355997.pdfIn PDF document text
    • https://norservis.cz/files/files/47164485016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ldplayer+offline+installer+64+bitPDF 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_off0000bab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 10948 bytes
SHA-256: 4e257f3a32e38aebd457034a92413c5ad35f4138c8abefcf35efe61c8b11836c
font_01_sfnt_off0000d40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 16808 bytes
SHA-256: 4f9439ec5ade26c7dbe9358395241a6a982ca3fb82723690140e7872586f1953
font_02_sfnt_off0000ff9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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