Malicious PDF — malware analysis report

Static analysis result for SHA-256 2362227bc0f63cd5…

MALICIOUS

PDF

87.1 KB Created: 2021-07-04 19:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2c8dabb274acab59401b48c4afab64d SHA-1: 693beab8b9d77a1d10c7b11cbe4ba0352f3961dc SHA-256: 2362227bc0f63cd5cf876bd7b46cf3eb5b795a2996f3b7585c4af891c8981f50
156 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as redirects to malicious or phishing content. The PDF itself contains obfuscated data rather than readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/s5m63d3vh7eka6l8vgsa832nd1/manirokuniditugolofano.pdf
    • https://performanshost.com/calisma2/files/uploads/33211454873.pdf
    • https://windfreeklima.com/upload/ckfinder/files/xujageruxugajenukexe.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/ca19a7f8348d6a5397a073c1ff5b7568/36232750136.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b0d93d9f3cee66896019c7a41f7ed023/rufebesejaze.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f87793ae65---wovadizazeb.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dff1f12cb89---podexejejozod.pdf
    • http://geose.ru/userfiles/file/50670393764.pdf
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740f7d464e4---39840016232.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/9c1dff49fa6c4b49b9cf35a22b489c4c/53645870461.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/77260495191fd0839e68b77ec4ac3e6a/38348851798.pdf
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/remepedag.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/df2d6kutti0ar67p1cqfs1d5k9/82216602966.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa05878d78---51201858374.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608657244531c---vajoro.pdf
    • http://piazzademarini3ge.com/userfiles/files/16213081749.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736f392e678---46632679587.pdf
    • https://alnahamgroup.com/userfiles/file/tewuwubudexaludexixopakim.pdf
    • https://alihuata.com/userfiles/file/duniridanetanigi.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/e98fbe72b2da23c4227ea736aa064c3d/37695839478.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6965c57649---30317239242.pdf
    • http://119pump.net/d/files/85000900942.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074751fad358---88222213463.pdf
    • https://luminex.pl/upload/file/33852970745.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=case+mix+index+for+dummies
    • 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_off0000eed6.bin
ecc26bb4a8101c0207b894e7f35294839d93699bf5b07daa6430c64b54aa7c61
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED6 10604 bytes
font_01_sfnt_off0001070f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1070F 16792 bytes
font_02_sfnt_off00011f21.bin
500150da0c341b1d28c20343ab6ee8286f2c763e071c6886cdd1f00171d84968
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F21 18760 bytes