Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b5279ff671bf48…

MALICIOUS

PDF

97.9 KB Created: 2021-06-26 22:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f690fa1aae80fe487c7c9a68ad46bf17 SHA-1: b7bdcf70aaaf989472a7bbcc047a5550230d19d7 SHA-256: c2b5279ff671bf481434a270d6125c4a61410ccf2f3cede978b2f1528986f6bc
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics identified the document as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as a lure to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c94b85bcd---17542722274.pdf
    • http://glina-master.ru/admin/ckfinder/userfiles/files/18289794358.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7211669097---safizalunaviduzijigam.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ivlskqpfim2kch23o3h3skgk8d/sinaxakin.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160710706ef4ae---numarowij.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/bd6t7mh5a3i8lmptonjk83olkf/57851575350.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13a3e5d48---28675599608.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17e63370a---85657254985.pdf
    • https://artasedanasingaraja.com/uploadfck/file/45584904858.pdf
    • http://eventologia.com/userfiles/files/83609519646.pdf
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/galukepak.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/bcc5e5f16d25c5c2792fe8bc171f6f6a/60506521138.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/5c95cf250f92efc79b8647600b01b55c/fojuruzikowisoxivok.pdf
    • https://zohopinler.com/calisma2/files/uploads/7671462103.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0997d76c1---madajomorejuxapabog.pdf
    • http://amadpich.com/userfiles/file/18958284281.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/4av8nghtam0t1funfsd9dffp5c/94235485331.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/3srmgvffcrjk79beu2cr290gu9/bilodomafatuf.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/60011203673.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c709fd7b6507bc52e2f6764a08dcec54/vatoxibiwigij.pdf
    • http://cy2hand.com/userfiles/niverinalozasiberofozu.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/2100b3db49c8e127c3530c091be0f3e1/20830635277.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/dos6m1207pn3f2hf3m3a0r7e63/gapujojipuxuxusudewu.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070547bc278b---wafafeba.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+wife+of+bath+most+likely+retells+the+story+of+midas+to
    • 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://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_off00011856.bin
f1e5c2d1cfdcd6130c02bb62d1db6b465b622ddb72f7d86acb008059d4b42254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 10908 bytes
font_01_sfnt_off000131a8.bin
003024dc3a6aa062111a01997484d8cf6a1d479c571dfe690f99a19be49577b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A8 17556 bytes
font_02_sfnt_off00015fb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FB0 16792 bytes

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