Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc3d3b91687e3c7…

MALICIOUS

PDF

79.9 KB Created: 2021-05-15 19:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec702698201a1dca1fe61eafb54d6179 SHA-1: 59bcc9983ba6ef629b53a365649288b97b238db3 SHA-256: ccc3d3b91687e3c756bd188a51b250253ac639c382357ed8d99502636ce5bdf5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm hosted on compromised WordPress sites and disposable domains, a common tactic for distributing malware or conducting phishing. The ML classifier strongly indicated maliciousness, and the heuristics point to the document's purpose as a deceptive link collection. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://alkanboya.com/files/file/%5C/73600481939.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/a2s7kva0n6jbt6copq1b18aa8r/sodoba.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852735a2547---13109626933.pdf
    • http://angarakshaksecurity.com/userfiles/file/nawatog.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cf252cd99c79255e6a02280e3e89e3a0/katexogeje.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076421bbacbe---totajuberozu.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0f073594---87534328401.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075280280c37---50743761508.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608951fd85bd2---jogidazodufofajilodin.pdf
    • https://tavio.ru/files/file/lifulenidatovuwiroxikum.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/35fa98bf1517fded6bb2483d3b3de070/dadusarapoxeritipuf.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7f8576219---desonegeko.pdf
    • https://aronabritcan.com/userfiles/file/xizulowex.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2e4fc207ccd40edfa578f686c5474f3d/juvukivanixi.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/7996a17750473f184a5fa0c8ce726254/64700421277.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607879b24ae09---gapulovakakosafikapipiga.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e514ff05---jobonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=steam++keeps+dropping+to+0+bytes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f1.bin
8e1deddb6418db4b1dabe2d63573164acb92fdac261e9e69e2c2edf1d7770637		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 5796 bytes
font_01_sfnt_off0000f695.bin
dfeb930f089bde54be9e165e9189131d1fd912748d6ebf98ad1012adedd61021		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 11252 bytes
font_02_sfnt_off00011c5a.bin
0d9fe06fa9bc113493b5652ce5eca02873c6a23eda3d03a8650afb2d40b51a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5A 16436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.