Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a726c5c9a724af…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 03:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d393d9bec309539fc0ce243263a83268 SHA-1: 37421b99905bb9fdc258e7ac6734d9b7c0393b73 SHA-256: 09a726c5c9a724af874214c4d1d1bc22baa601e226da962c6997afe575b70570
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress sites and other disposable hosting domains. The embedded URLs are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/d4efd5dfc2ae8723511ccab1cfbea231/pesigedikofabaduruwisu.pdf
    • http://bartuceviri.com/userfiles/file/mofefipuzoli.pdf
    • http://ankamet.com/userfiles/file/53639087239.pdf
    • http://onlinemidias.com/ckfinder/userfiles/files/putud.pdf
    • https://adikkedua.com/contents//files/61112365097.pdf
    • http://aite-materials.com/upfiles/file/55773048629.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/5eaf986f7689aba0c5f5e63a2b7b765e/44137680467.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/4080da4ec4fec2fa7068cc76189bca0e/tiburi.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075919da676e---23329890355.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c5ef75966---64222626337.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/08bc17a8f1c65b62d38863b41b6da4b3/50472016858.pdf
    • http://simonhoirup.dk/userfiles/file/ropixegedak.pdf
    • https://kawanmto.net/contents//files/7806617349.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/855ff934067133d88f564de1e515ec10/davosavifoserugipokipibu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb49bedd45---motudizepofab.pdf
    • http://alimentosldm.com/userfiles/file/38448591027.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/12345b4eb5aff91c84f67ce03b37f74e/51991906382.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f737a0253a---tofenusub.pdf
    • http://atenngo.com/admin/sites/site/documents/28078654883.pdf
    • https://bouveau-consulting.com/userfiles/file/24582293746.pdf
    • http://enjoy.sk/editor_uploads/system/files/9091002302.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc893405dc---sivamefagi.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706fe8b0c05---60574252182.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=color+that+represents+peace
    • 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_off0000f03f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 16792 bytes
font_01_sfnt_off00010856.bin
36991edd3b594476680a8cd72dc00c81919fcda50dbac5acb6f0d11ca0072d2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 10412 bytes
font_02_sfnt_off00011fe7.bin
c0aa956032daaf6bf3652f9d957465ca744b91fffc81576d2f1a752aaeb8f864
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE7 17408 bytes