Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed69ed0ab7e33258…

MALICIOUS

PDF

80.9 KB Created: 2021-09-07 18:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 84aa4eacd950c4bf961201d21e01d940 SHA-1: d5963188fbe20613431961a221ffe46f3ea16dec SHA-256: ed69ed0ab7e33258fb88c6aa35d6221bc5bf9b492d0a4e7eb3b51ba0ff5bbb53
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple external links strongly implies a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=mathematics+form+1+questions+and+answers+pdf PDF link annotation
    • http://szpk.hu/_user/file/kusetej.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210626231022.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775a4bad356---mulalevekuzaxuradibajawir.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/gipagit.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/fda5ebbc93d04e721072a7924ede90ef/35300397934.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/xekat.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/zutafidekuxowusaf.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609747811048d---48428200310.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab296535c80---nadudebefudotalozufexow.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/9258609995.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/tuwaguverobizuda.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021080902265673499.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/83290896924.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/cc1ct6tk2u8mtqtggsugi96d8o/82799407912.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/34147374023.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/rurofekozo.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/wijitumapoxibixekad.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fcce1524b---72228298937.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/4314aa3e851973d26edd9b5efe8f2125/webabexidederanuseton.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052818013044.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/8e80b9c0378402c8b60992de6b85d94e/rusorekaberowagit.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/kefegorerubojefes.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/zunimatorum.pdfIn PDF document text
    • https://bachson.net/upload/file/vadelukumopizonagujegaxij.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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 11216 bytes
SHA-256: 2f300d3d54e71735360ed8110bf6bbaa24dd3c0f7d3e87d4a8771fbeb4406a9e
font_02_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 17588 bytes
SHA-256: 5b6981dcc57bf165c248d59e4d87ab8f02ca048c8b9d50b4740bd86d56077e3e

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