Malicious PDF — malware analysis report

Static analysis result for SHA-256 4574701547ef81d1…

MALICIOUS

PDF

86.6 KB Created: 2021-08-09 14:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3ee054f8cc08c03b06c237593e61618b SHA-1: 1664dd0029aed602b2d9063f9ca98fe3b8cca8ba SHA-256: 4574701547ef81d1f11fcbf61d941e9c5ee5fa31b9c8a46305355111b1c00758
156 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://shreyaghoshal.com/konadnew/userfiles/file/44788955060.pdf In PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0bd3c962155c043d5d21e65cfc93818c/vivujorufetave.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d05ce2dd6af4272d2fbdf0050ed21b6b/84983254114.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/nivukazopeluxozi.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/jesukufegapojonal.pdfIn PDF document text
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/xatatu.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/87146747632.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/ec0c1baad0485c2b284e84b461247bf9/41265702769.pdfIn PDF document text
    • http://vasamo.org/pds/userfiles/files/mukafuniwi.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/xozunijobovarexisux.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/pobemajujasawore.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d43bb56e16---somajona.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4cbcc8c1a---64086591884.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771cc363df9---66099094953.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/gikunosuxe.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/82396587979.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/30e40b2036e500ca5639de4fa487b880/49117115674.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b206f28531a---20407320624.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d919a81946---wazos.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/64806041151.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/qdjbdvreubc5vijma975grf0tp/jateziguxorewigekotipaj.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bc61234a917---wejotakosodukofe.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/29885349836.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/uch1tee5ejhje0ml2t4b1ln537/togivuvegosezupemuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=clases+biblicas+para+ni%C3%B1os+cain+y+abelPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 16376 bytes
SHA-256: 0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
font_01_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 10760 bytes
SHA-256: ae5f206ad76e028e127bbdc8e0d84a4376a8806ed15e2998e4e9125bfc9771cf
font_02_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 17660 bytes
SHA-256: 45f4799f03efded2f3c1cde459c633d2ba463b8e7a38b7add569112ef07136e8

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