Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bbacb52c5fcadc…

MALICIOUS

PDF

79.7 KB Created: 2021-09-15 12:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ced24ea34eb3942e0568301b86a44bcb SHA-1: 9e656431f23c28e6a3470cf5f91dbd73a479364c SHA-256: 30bbacb52c5fcadc6b277ebb2041980b7d019a2fd4b9b324cfb03907df3641a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/9298270f50f63ea8919bc7abed51e667/jepomimelisogejerawe.pdf In PDF document text
    • http://htwy.com/upload/file/27363731636.pdfIn PDF document text
    • https://kiptep.ru/file/81706533556.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210914042528.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/32994397198.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/kerisavixesonabebizejed.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/musisewet.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/3d68946ed2222cffb9a48bf47b4e5029/zasafowojowafidimut.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/26426326377.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/0tu4rolis7snf5s85f0qtoobit/19704719065.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/92926838688.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/roloriwikejisezud.pdfIn PDF document text
    • https://goldengatetaichiqigong.com/userfiles/file/fodupurosexogopojexajilom.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/53477004697.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/95026132527.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/pebizefeleriw.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/17158754613.pdfIn PDF document text
    • http://t-cso.com/upload/file_folder/file/81220372151.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/rk7m0m1vtd4hp2vn8m5mmsied9/47309288649.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/86990125623.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/45111298640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=free+fire+diamond+hack+mod+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB796 10628 bytes
SHA-256: c54e018c548e431f4d8ef015955a79f55db9799e3bdf02c8ad753b58d9bd7d69
font_01_sfnt_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_02_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 20044 bytes
SHA-256: 6ba15884d28117a88f5b6c7c27fa38b35e0649b8edc7117e3c548a3f1a7480ac

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