Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f48d27e88cf7c3b…

MALICIOUS

PDF

74.5 KB Created: 2021-09-02 05:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ece725bb7448c4eefe664505b1660bdd SHA-1: 7bd794590fe2bf021b73ff1bd2acc5a8a3816617 SHA-256: 8f48d27e88cf7c3bf6af312ec9b4cb69ad74b4a1d20b8723aba775e08b0859cb
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/biwuvepe.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd0d705875---wasopodalumilumolalusi.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/032eb1b26ee62fb2bf37aeca6103042e/86851202052.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/55e7afca05bc1eb9c77273030c43b340/voxuzavejavakaditew.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f94c069a77182ae9e42f2216cdd98c50/viwubexawekep.pdf
    • https://hitourkorea.com/FileData/ckfinder/files/20210802_7325AFC820B06BF4.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c2694d78---13559467636.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/wusupoz.pdf
    • https://securitydm.rs/slicice/file/43168369443.pdf
    • https://wittnebel.dk/file/xakuda.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4lde0644gag0chgr5cgibi4121/gipagorunexufiravogelulu.pdf
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fomexe.pdf
    • http://lovelyspa.net/ckfinder/userfiles/files/pizimipelidixuvigov.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f9610ef9e---30825756172.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9ad0168cd1386d2e3480ce813a05746e/fotutig.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082900a094c3---82862818496.pdf
    • https://autopsrus.com/ckfinder/userfiles/files/28184577924.pdf
    • http://cpk.by/ckfinder/userfiles/files/93759321224.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a73e9199d---42863330378.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e36d34763---33056323805.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202107081534254742.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607007b103046---67531267949.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc09c55976f---30413412511.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=2018+kcet+question+paper+with+solution
    • 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_off0000bd92.bin
f8907b039412195e14a4e19b279fad00eb11b4e673495da09af1efd848442f5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD92 11300 bytes
font_01_sfnt_off0000d835.bin
f67d42434aa3afd4e3d3f065491013af34cba599fff364dcdb85504024e72016
pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 16676 bytes
font_02_sfnt_off0001035f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 16792 bytes