Malicious PDF — malware analysis report

Static analysis result for SHA-256 64948519219dd47a…

MALICIOUS

PDF

84.3 KB Created: 2021-08-01 07:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0a70c1924c7cfb0a410c43b7fdab6d16 SHA-1: 9164be4d8c053ad734f89de21e01e424d3763b37 SHA-256: 64948519219dd47a76e47da46dc8fd4e2873d3cd92f327b602c35a1963936485
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used to distribute phishing lures or malware. The PDF structure itself does not contain executable content, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd712b8db---rufitudoguputizotax.pdf In PDF document text
    • https://acryl-bg.com/userfiles/file/94988735774.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f951179940---silifaveliga.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210718_E462648D89E08E37.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021073132810_1025688020.pdfIn PDF document text
    • http://jentretiens.ch/uploadimage/29925029721.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/dmejsvmasmuej9du252jdblmlq/roretifebavotidikig.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/91253c6848a0b95a65ff99566d59047b/kawidejilil.pdfIn PDF document text
    • https://inncredel.com/uploads/50181162598.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/b18affa714fd196442bb941141f81921/68360643651.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a62e15e42e9---19767911526.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/bilinemebarizatizovel.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/b234c8017d9dbf19f93cd81f6f85efcc/kexunape.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad7ebbeb84---zotore.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/31893124382.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7266835956fd90c460e6b0910cc14520/94186113829.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/p7op8l6avn14ev85e6191ti464/45774175983.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/69cb6fca391bf10b42897f65e770417f/vevaxamog.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d915483591d---73388952547.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/6c1a37c13c0948e45ad6028a743cad7e/lenoziwulepujetadimile.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/9960o72h6afnk82b5r6a200gq1/32832880897.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/53277061009.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vor42s4mkdpqobne3f9364vosu/98508715343.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/dudajaviberogozifumupok.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7f41efe1cddea4c74fd5ff51dd5283a0/kirovatobexegumov.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/91046991606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=miraculous+ladybug+season+5+episode+listPDF 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_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 11172 bytes
SHA-256: 4bb81fad3cb3bd6ae0a16e8baa3c019e55c9d843855d2282c58975596e3e773f
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 17304 bytes
SHA-256: 4cb87e606db97104a615986c8a4aaaddceaf769ac03b7227066aa22bd6e3a950
font_02_sfnt_off00012a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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