Malicious PDF — malware analysis report

Static analysis result for SHA-256 475c0924ebf7d650…

MALICIOUS

PDF

207.9 KB Created: 2021-06-20 21:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c89986c04e64ae5f7a0b0d6cc59b59f7 SHA-1: 13e4c416220bf1a55557bb2f22c2b90c14e07210 SHA-256: 475c0924ebf7d6504ad4853d989d36f903b2d9db554872ce53eefcdcbc663b1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution, disguised as exam preparation materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b993ebd9e4d---lajopowimevowiki.pdf
    • https://augsburger-dartliga.de/uploads/file/4475501903.pdf
    • https://alatheir.com/atheirwsfiles/file/87204258586.pdf
    • https://dintek.eu/uploads/file/dosuxenob.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af17670e82---61741100746.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608512f949d44---xojugunokevas.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/8155886be6dd357945e1f7e3cb9e637a/faderoduwelotap.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/77279206448.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/f90c564363faee63287e9fb64a0c4402/75184074219.pdf
    • http://firewheels.pe/userfiles/file/vetisixufofawosavar.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/ribev1v7gjo3sgteotihujd6g7/61548009339.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/4a98f0115092cad99fffb6a4aa07e40d/48510140193.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/682542bc9a08926cba755f54840ff4c7/nebimev.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e58ea8158---tilixodawexuzizolub.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3f3836c81---razabori.pdf
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/fuwunegavan.pdf
    • http://auto-spec.ca/fck/file/85619748762.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/306c1fdae5a6822e4623ff012d5bfc93/39056772082.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=recent+ielts+exam+questions+with+answers+2020+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e888.bin
0ef12b83747571e0bbd96ebc90168b8d736f566b84d399c964f0d13d253e3553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E888 5844 bytes
font_01_sfnt_off0002fc4e.bin
0d158419ec65936833bc720244784803220d476a798722a4450e66387caf7d0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4E 11292 bytes
font_02_sfnt_off0003229d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3229D 4324 bytes

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