Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbece46f4ed5bf9e…

MALICIOUS

PDF

88.4 KB Created: 2021-06-26 02:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5ff0b26878c605bb607ad7f699a35452 SHA-1: 4aa37cc19dba56128727d46e1b21ec469533fc71 SHA-256: bbece46f4ed5bf9e39b6057160b83b671de5dc3a81a032fe88dfdbcf21e0263a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=riddles+with+the+answer+water PDF link annotation
    • https://memoservicesrl.it/file/93716337439.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210604_CBACD8834AC9BA6D.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/c47317739623c5c0d0665d53fd9d5522/xavuselabudifalimavil.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/zakutataravudovopanapaka.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/aat6k8p7luv139vabj6k5lig9f/gegifogenujazad.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084ea7481265---82573207670.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/18b5e2fb23069fc104314ec73544cc26/67115101010.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cd2b48578---41141111350.pdfIn PDF document text
    • http://ecole.ru/text/images/file/fisevabedejisozu.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775af7060b0---mezawelanerebaje.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/34402344198.pdfIn PDF document text
    • http://poorclarescork.ie/images/lonebilebizotoj.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/85058640266.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a72c74256ed---12087849247.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/a777e5f9a660718e0e04f5eff7f7856b/76479867621.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bff36133d8d---nutidubabe.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/vavatuvemose.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/zudajimobowutome.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/baror.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/76824135324.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16076f78ccec60---liwiwifaxidaboxedup.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/62768442657.pdfIn PDF document text
    • http://someteme.com/archivos/_20210625055617.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/e0oipl530ctflvrlmpgros8d30/71238605643.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/11103329790.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_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10356 bytes
SHA-256: ee1af7f11d9056b57aa6fcb525dcbf9a318db0de0a1215d7da5b598c93791691
font_01_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 17632 bytes
SHA-256: 0657de7320fbc24b8b5239aa943c0500f44be7e305dc28afa998c283ee689ba5
font_02_sfnt_off00013c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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