Malicious PDF — malware analysis report

Static analysis result for SHA-256 037d296aa296dd53…

MALICIOUS

PDF

79.4 KB Created: 2021-09-07 05:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8a43fff822ce939ad3bbe9a907be449e SHA-1: 54320c5ab5534cf2f877faadad0031d1b2a70099 SHA-256: 037d296aa296dd53d2e762a8f950aff2b77af530a2a8f91d8753e2506adeff28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://turhantur.com/turhantur/files/sovinajugewutoridor.pdf In PDF document text
    • http://seteo-dechets.com/images/file/36226816629.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/li7os0l22tofvd3fp7n3sqia12/94820272757.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/kufutexasipav.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/tevunoruxo.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/wakamamewuz.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/m2bg27u99o6tgsouv45ajmvqv2/59574519148.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/31567585634.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aef2fe1cd8---lojavenaredudatowajonare.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pudonamezituku.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b80d4f805---zawopujupozukibosofad.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d248918375---titogofokopuzadodarirav.pdfIn PDF document text
    • https://tmtteks.com/files/63497303036.pdfIn PDF document text
    • http://climtech.com/files/files/bamelureduximizutitidiw.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16096bcbe8f2bd---jafusida.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/24353287488.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/tafovemesojasugarevo.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/kejuruva.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/1fjbolmdvuccpn3bfm6b3d5rsd/90021117962.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/cebfc8110ebcf28280ceff7d883b3c6a/76169344220.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202162510440567.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/64199844591.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/87703197630.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf19aae3a1---zeluberuzisegi.pdfIn PDF document text
    • https://2acontractor.it/images/file/88908388785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=weider+ultimate+body+works+exercises+pdfPDF link annotation
    • 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_off0000ce77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE77 17916 bytes
SHA-256: 35b38d98f62560ccfbcd3728fe3f92766f531511356e04fef58c8f87c882ab48
font_01_sfnt_off0000fd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD01 11304 bytes
SHA-256: 71d500dbb3cd6edfff39cc766923b4b1d17e5c831f9918cb4c8e5d19d11ad6e9
font_02_sfnt_off0001177b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1