Malicious PDF — malware analysis report

Static analysis result for SHA-256 f152a39934f616e8…

MALICIOUS

PDF

72.2 KB Created: 2021-09-21 01:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6326ce21021007ab9e91c2a42927eb61 SHA-1: c65ab859cfab35e53eab8bbbbd73f67fe8b71a5e SHA-256: f152a39934f616e8509def2a18af92a818ecfe8e0ef7e4712e352fe18b5008d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external URIs and is identified as a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links, including those with UTM parameters, suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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=ping+tools+android+apk PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/222ruste2e0ebqdup4tpq8jeu5/67428934890.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/34024489480.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613770a88ae67---71616220386.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/22510089402.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/2b60d82290ed10037c864b5ef240f3d7/kizarexodogijetusawu.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/suzatawufafisowosatiwi.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/bipojarikixerum.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/bumivemugokodafobito.pdfIn PDF document text
    • http://xhzhengli.com/upload/dikifetegozamo.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/nuvoxexekugujadik.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/65917027145.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/95026323977.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16134cfc4bd7a6---mosudizik.pdfIn PDF document text
    • https://tedesco.pl/userfiles/file/56421616514.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/25118098521.pdfIn PDF document text
    • https://podimercrm.com/img/files/47687676115.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/wojasagugajudozakuwiw.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/92696012928.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090907564350.pdfIn PDF document text
    • http://myslizdrave.com/soubory/18870542398.pdfIn PDF document text
    • https://btegypt.com/file/39771381732.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72255686862.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/mokekamekodimiwawesikijo.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161401a6edfe6f---jikazemugababemexomu.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/vurizuvakefetewagetut.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/91885036083.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_off0000b709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB709 10528 bytes
SHA-256: 8141cad2f3fe6658617b480604ce5642922300242645be26a5c4447f65e885ff
font_01_sfnt_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F6 16864 bytes
SHA-256: 6f503d77cccd5cf162611fadac160bc31a56f8ddae00aa85e16c082001c7fd68

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