Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ff8ba99ed059e6…

MALICIOUS

PDF

87.3 KB Created: 2021-06-29 06:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29935d619e8d66adf775017b54542f79 SHA-1: c3578a5f44a3672ff6769182764127d53c5483d0 SHA-256: e2ff8ba99ed059e6cc6cb19c9fcb88745bed7cee61c4af9c0b49103e66cf4e1e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates a likely intent to redirect the user to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961e1d1d6ee---povivawadikotawa.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084fda35f58e---22693176069.pdf
    • http://bjeclinic.com/ckfinder/userfiles/files/pupitob.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f455c3baea---mitatijamegujanoturumitaj.pdf
    • http://szwygs.com/upload/75050643248.pdf
    • https://heritagecambodiatravel.com/userfiles/file/wulujokux.pdf
    • http://4grd.com/cmsimages/file/gukofapunafemuseki.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/iovgrqqh9vkj4p0lbied6g2dhj/kifapo.pdf
    • http://sushi-belovo.ru/files/51117807809.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160795e74868e0---pezegolopipisetuxediloka.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160976f916db4e---54283306948.pdf
    • http://thucphamchucnangmy.vn/uploads/files/miritozutumewebimebuw.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777e713e52---xepovid.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080197e43bec---27960463417.pdf
    • https://vibangnhadat.com/uploads/files/94573745765.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160712a2bb3da6---mufapafetevikododovi.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac05b05cbda---mobolijar.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9a862db8---73105650477.pdf
    • http://monkey-do.net/userfiles/file/35536522968.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd6c66a2ee---xirujoselusikavegov.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b9fd2def---35454041484.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6efecede---95502190626.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d976a55edc---bofasogilakekobemapixaxa.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/pouh6c8244ov4t4cg2ciph3r86/26360036016.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503024753664053.pdf
    • http://s-privod.ru/userfiles/file/sivep.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=india+world+cup+match
    • 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_off0000f23c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 16792 bytes
font_01_sfnt_off00010a4e.bin
d595d80b25eb82bf76b2c647044768411ff91d0c614ad860823713da58ac48fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 16928 bytes
font_02_sfnt_off0001366f.bin
634e9c062d8b42bfd4e0bae551404c0d1ce8dad646185dabfa9f438f58c1b266
pdf-font-stream PDF embedded font (sfnt) at offset 0x1366F 10616 bytes