Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9c8c6671d8c651…

MALICIOUS

PDF

89.8 KB Created: 2021-07-07 10:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5f349b8042a0280afee02ea1fb43eba SHA-1: 747b6053274f247cc6e2006eeb38c392c068c598 SHA-256: cd9c8c6671d8c651a25db62360706a2b79baac335b915f1babe1839ee93d0263
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or raw IP addresses, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of JavaScript indicates a likely intent to execute malicious code or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba665b6d03---joliwisewanija.pdf
    • http://zabradli-znerezu.cz/userfiles/file/rubobibanulekebaso.pdf
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/15353614910.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5de3a297---dunemipufarijipatono.pdf
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/97228015464.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/629i4rjvffneblln86d6mv4c86/rokutuzisetofo.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/545a83ca2bcefa7a5679db3e2a83da0f/26606098629.pdf
    • http://vdadanang.vn/app/webroot/assets/files/puwizesakuluwebos.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b674bb35128---41698782914.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ceedc88c3---falimofimesekafubopipufop.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de692b7384c---56832840256.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68d489755---movajugokog.pdf
    • http://docando.es/js/ckfinder/userfiles/files/83435596424.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/ffbd545bb0c7c70e3b6a24bc175c7d22/52881141370.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab10d2205---jologitigumepakukinojuji.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4a7d5becc---22601557571.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/96761370200.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a23d5d8ef1ee85ab08106e8eec586086/bodufuduputelu.pdf
    • http://kibbkw.com/uploads/file/27596607509.pdf
    • http://www.look4job.gr/images/_user_na/file/reluwobovikedinofowupo.pdf
    • http://etcad.net/np/upfile/file/tagadevatepimedobiguzetim.pdf
    • https://tekartltd.com/upload/files/12644960609.pdf
    • https://honghow.com/ckfinder/userfiles/files/1087668426.pdf
    • https://aterhesseg.com/up_image/file/95665659584.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=anime+streaming+sites+for+free
    • 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_off0000fd50.bin
6c5de95cf3b1ee513c1c88edcc2f3bcbb241e1f2bd442ce3ca06650151c41486
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 10492 bytes
font_01_sfnt_off00011530.bin
f8ff9fd9ba9c2550aa315c47c432bac26e7ccf6462c575243d4e3969250b0161
pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 16672 bytes
font_02_sfnt_off0001406a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1406A 16792 bytes