Malicious PDF — malware analysis report

Static analysis result for SHA-256 e758680dd480837e…

MALICIOUS

PDF

85.7 KB Created: 2021-06-26 04:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6aca20773db8492e25a1815fcdfe3fc1 SHA-1: 97bd0f95df39fda0481f6cd24abc58a7039038b7 SHA-256: e758680dd480837e67343a62bb26756ebf66ea1c6bfa664c87acc830cb408a2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external URIs and link farm patterns, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=moon+and+rahu+in+12th+house PDF link annotation
    • http://yournamebadges.com/withyourdog/cms_uploads/file/xinojizipabilela.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/95870555046.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/us7jtkojguf95falefl7se7gi7/52068181839.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/zixawevunezawika.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/28a0726auj394qp25fv414ck3g/davabidu.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/60337127458.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/gk5e0i6ci50d1d30ud55jlvopc/43658167973.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a58e0521aa210b72703a4421f98c9c79/difozunigate.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/kofoxazusavomedexavefu.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/bef2b80eadea249ab8d83d60c68bbdf8/tifenuletebonula.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a47c8055ca10eb82c4864c842c8b3c15/gokaxilexikilabezesugiz.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098a046f34f3---wirutugapimaxopobuk.pdfIn PDF document text
    • http://e-hematologica.pl/users//file/696776518.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/88267161615.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a0988aff1823e9076d185c3c0835847d/nesiwufisidinuboxat.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/fa9f6f59afa0d5062f57afcdc12d45a8/40976403177.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac742db707a---garaxebidemamifi.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16242626033046.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56699e9075---34915003996.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052503145463.pdfIn PDF document text
    • http://abnicum.com/files/file/nezebikisuresi.pdfIn PDF document text
    • http://altinay-law.com/images/file/selovogazazasawujimuwe.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c0908a9edca5c3027635903d7160a62a/fekuvilofimojisuzonaxufas.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_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 19456 bytes
SHA-256: 9c3384b1ef0caad95d480b2e122ed527fa7e2e3971613b464a9e0b0c41567b8e
font_02_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 10564 bytes
SHA-256: acaf210960627865263f715126b4736a2b7763175b174a04acd3a8434c998cfd