Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0f7d0a8c0c650a…

MALICIOUS

PDF

90.9 KB Created: 2021-07-24 03:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 80ae01bb5be2624b12a85f0853ef9d65 SHA-1: 6475f685d70f5a268f8e503fe594fb4a2bda79f1 SHA-256: cc0f7d0a8c0c650af160f2207056b18181a960634d2a33f876ec8fe00100cc78
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised websites, suggesting a link farm designed to host malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. Although no scripts were directly extracted, the presence of external links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chinoboxingclub.com/clients/36032/File/dosefurepujosipapu.pdf In PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/dos4cvvrvgmvfu44sou1ev21t0/wepap.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/9ef2bd85a8254f3cf07b2069ee941a19/24467302357.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/venariv.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/13969142370.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfa561cb4d---relupezi.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed7aa94360---29158512011.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/af4e7571b0f79361d59f6d377071fc14/xuxefe.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079039e160b3---72957030672.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160706dba25b59---kexaruwojoja.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b0da35ff0365dd455db5da556d0ceb38/suriv.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbaea3f2ef3---ragepoxaxipugugagifezedi.pdfIn PDF document text
    • http://klinok-saintp.ru/files/11089138833.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/judivun.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/62371648129.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/pj7slj76klmrru6utge9qj06s1/73773779422.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098335d1ee7e---jefosimalutaba.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d811ac2c294---gipanulupem.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/68437009919.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e3f9a08f0f8---jidiretuxum.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607895d621e8b---tupopatimulivukesugaj.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3b6879d15d50856c7dd4abab652bfc93/zobexifulunebifege.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210527065947132.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-19/20210519122401803664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=4ukey+for+android+activation+codePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA4 17312 bytes
SHA-256: 2de9eedc19db34695ba76f73721cdf25393904723c622db2db5b6322a61583e5
font_01_sfnt_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 10608 bytes
SHA-256: 7e4c32c6d5e04ba5765f97f627cb72ae9ed424f2576ae6f4250613426163c70e
font_02_sfnt_off00014435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14435 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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