Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dabf7dc8e6cd6a…

MALICIOUS

PDF

83.5 KB Created: 2021-06-13 10:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 298cc69d14fc39183787c9809dd2674b SHA-1: 5cabf1559b7eac7b9ef9f0c17541a6977cd63e79 SHA-256: 74dabf7dc8e6cd6a4fab4950dd3558fbe83a4ae7b04fbf96550fb75d33c8d95a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=mehboob+sanam+tujhe+meri+kasam+mp3+song+download PDF link annotation
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce76d12e0a---sosinuliborunomilam.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb5807680c---26057313831.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160809fa2dd14b---36908912595.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b29bfcad7dd---84193551477.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085173dedf22---50823630734.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/94c8ab020642c2b1e4ac765d249f2fd9/viwofebilosulimu.pdfIn PDF document text
    • https://ahha.az/userfiles/file/mawom.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/79260092510.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/13928576802.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f609721e6d---47669975657.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/nunexopilorajiwafafekedun.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160965d4254a2c---bejimokegukaredibeku.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/piderigaxo.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f661ecc6a---2990582955.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/a162578550427644de522dc04ce7de7d/kitok.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833c0902791---naxop.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/8737897164.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e823cb397---jolaseti.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772ede47af3---supijukoporokimaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn 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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 5796 bytes
SHA-256: 988e4cd4eea303533349c512ce29d652167507f90e4eafd56290b311299f32b2
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 11164 bytes
SHA-256: 1ea9ed0645420b58009db6967e8abdfd238e3de0f155eedfcbf769d31cd5ce67
font_02_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 17112 bytes
SHA-256: f9dc15b9e7e1a45eeec377706f6e9859ce73b6054018bdf95ecdbdcfaa16ab0e
font_03_sfnt_off00013221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13221 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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