Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2aca2fbec55239…

MALICIOUS

PDF

76.3 KB Created: 2021-05-18 18:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940170b90642864c9a04298f3603e506 SHA-1: c135f306194c7e6684d5c65efefe00e413cfa6db SHA-256: 1c2aca2fbec5523905f12837fcf2c901dfba3110ab3e3a1c0cc906254675c343
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to firearms, suggesting a potential lure for specific user interests.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

Heuristics 4

  • 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
  • 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://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/k7kh8oedctq0el5vlodohfisf3/neleduzunu.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832d1b27f58---wokapexetaf.pdf
    • http://eltonltd.ru/sites/default/files/uploads/sumalerivevexof.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/pmjjf1gkqe598om1i9p029osj0/pofofamunalolafitisuzasig.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429035533555142.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd1c9b36f---kovusetilewavebafimumuk.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289745ef1c---65499864464.pdf
    • http://mulroyenvironmental.ie/userfiles/file/43186851262.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b495ddca---51567042474.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/8d8b33abd8057ee967a3487b05efbd9c/26274689784.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608903f963089---gewopulebem.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607c577ced522---movidimila.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a147844adcf---8457859210.pdf
    • https://oddluzanie.net/userfiles/file/bexibiporufunok.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082710ca3be6---zeletokizegafewasa.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1587586524609638ed1215e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=amadeo+rossi+38+special+5+shot+value
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117bc.bin
a977be3bc030bcfa5c74dc7fd7b6ab5f7943759fd549a9e7b2741c72ea16a865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BC 5844 bytes

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