Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc2292eba86df4b…

MALICIOUS

PDF

88.0 KB Created: 2021-05-17 22:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc7bad67523825c4abb23f85832dcde SHA-1: 21b020a5d1794c07b4fa1021b108c419967a96d5 SHA-256: 0dc2292eba86df4b74e7dd7e0a189956dc697110b73d5cd41542be179534874a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple links pointing to compromised CMS upload directories suggests an attempt to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to exploit vulnerabilities or trick users into downloading additional malicious files, likely through a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f6573d31---xisuz.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ur2j02hpvgvf2uo515ih8q14vb/zulepisutegafadat.pdf
    • http://a-swiss.com/upload/userfiles/file/88281560962.pdf
    • http://garderoba.sk/images/_file/kobewetamawinuxase.pdf
    • https://xanbiente.de/userfiles/file/gekizisubefasonapoluvane.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/j82th4itv5oj16pi1l7dd6in5n/vulujotaxagegepamefun.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885ef447d39---jokidebe.pdf
    • http://nitexprofi.cz/userfiles/file/81336639127.pdf
    • https://vannordenvastgoed.nl/userfiles/file/51503559091.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c2500738---xonupagibir.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/at944ljl9mjt90s1kvir9f22m9/32227328657.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=le+passe+compose+avec+etre+et+avoir+exercices+pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/f4025629631125f68dd33504f9419217/gigon.pdf
    • 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_off0000f9fc.bin
06e3f9a0a5e6b0d7f1442b391df97a98762ceafc540555fbfa5cffbdc6a78d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FC 5340 bytes
font_01_sfnt_off00010c17.bin
75f7943b5db11f5206c5a3c8de3100db93eb5db15c72cc287986ed890bf8acc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 14788 bytes
font_02_sfnt_off00013b38.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B38 16312 bytes

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