Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d0b9057a3ea292…

MALICIOUS

PDF

77.5 KB Created: 2021-09-07 00:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2b4b4b3fded315ce743047f67f635b82 SHA-1: b9b689efb96a2bce1719b97855980dfdeb964ff3 SHA-256: 02d0b9057a3ea2922a1c67a678937c2de41d1de774700280754d71a0c841980e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting. No scripts were extracted, but the overall structure and URL patterns point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/0f7rk8svm07ll29jk1ra6sa0o2/zevolefifavofizerib.pdf In PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/320323d4d3aa4bbb9eaeb5a2a6c4608f/28044229981.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/49110307918.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/31528748026.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/94752016115.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/5084156761.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/40202575224.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e847a681a283c79941cc4c4f793de842/fuwik.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a14d118335d---totuninulizopukafadevo.pdfIn PDF document text
    • http://turexpert.md/userfiles/images/file/zisolitosuroburifaf.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/mosamaluvotofa.pdfIn PDF document text
    • https://sapporopools.com/contents//files/lafixozelopetuvov.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/folezezexunagasupo.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6ef585dda---kapoku.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/wosuxadafowiwi.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/rezapubed.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/xijefuxosexibodivuleriwit.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d831f061b42---56269361034.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74075863e---zonebejibefuzura.pdfIn PDF document text
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/tamimugofov.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a012e293a92---46397730332.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1833ed7a7---37794878066.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/jomevibiwopewulolegopa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=phd+thesis+writing+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_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 17552 bytes
SHA-256: c1dc937c36186e6cbc2d336eb0e91192036bb6870bc20b5b9f5d705b83ecd221
font_02_sfnt_off000110c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C5 10536 bytes
SHA-256: b7497160fda88ca1ebccdef92b5c0cd5e04e0f83952686f9487dde357c0b88dd

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