Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b97dc47c4459f0…

MALICIOUS

PDF

84.5 KB Created: 2021-06-09 08:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6212d91f81aeb40b95912cc8adc770c8 SHA-1: 09f10b82f5d08486c100eb52fb6b5193f4f5ab7c SHA-256: 09b97dc47c4459f0d5d86ac92fcb9e34b4236931ade827c7400451576db02577
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites, disguised as a download for a popular movie. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing or malware payload. The embedded URLs suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://allytemp.ru/uplcv?utm_term=download+india%2527s+most+wanted+full+movie+in+hd
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc5bb906c---dowalexirati.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083946e107b4---falosovufigesatopuxub.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907fee1bb9a---23948169570.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/9gdsvotv2ockghvb32900k77f5/sezoxagasujob.pdf
    • https://nenanhduong.vn/Upload/files/96720698546.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16076c1a872a60---luwetujebosaru.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/a33d9f7177031483d20f2a6b0ffbbf74/86808625109.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/o35j3oskfio2fid67r11lvfb6f/dogevozubadigana.pdf
    • http://zabradli-znerezu.cz/userfiles/file/32572089963.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cabb78720a---fanemosifepafezumog.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/79e2afbca13b807fd9398c17cb8f5a33/xatitubimepudubeg.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/rgho2t0hllcil5p1go4ee9gr27/16883364113.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8ntr1uv2m7l6uc0neacj5k7lu1/54382110551.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086be4a3563a---julebavakeropijonode.pdf
    • http://amdind.com/userfiles/file/18425468775.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608751a092c12---fegotufunijokor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f3.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 6440 bytes
font_01_sfnt_off0000f5e8.bin
dbeaebeb54967c73d52f505e319e55a6adebe81f9a56899cb4c78ce7f58f1cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E8 5236 bytes
font_02_sfnt_off000107ba.bin
acc449cb4ce658992c9330211ff2f1133eb9f0b9e34bfe6f9ecb05c0845bf2ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 11696 bytes
font_03_sfnt_off00012ef8.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF8 16164 bytes