Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b05918ff0dd3ff8…

MALICIOUS

PDF

109.4 KB Created: 2021-07-04 06:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a10aa8dc469568ce559e9b1873d0d0bd SHA-1: d0df8bab28625d218a66f238af10b9e0264a2f87 SHA-256: 0b05918ff0dd3ff8e573efa09bc0aaa51c6a531ed72f1e965cfb52782aa1a444
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, suggesting it's not intended for human consumption but rather as a vehicle for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2dfa540a09cce1cf360d29de8b396429/lunanu.pdf In PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5afe1ecf94---44222117013.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de257a5011---jolemi.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5b89cb37b3997be7da41989566f1ef7c/89578027402.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/13p9mm8pu5r6944k5bpjjgjta5/tawojalavenakonu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac242b15971---7465250608.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/4006a5f10aa78d45cbf239f5c42d6ff1/gizudunelasinovawar.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/2c449ba14ab03df5b6fca82ef61478b4/92163615733.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e23aea80ded3240f0785a214320fc963/jufodobenazefodizagogalaj.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/n3nk9eguh6ch1n5hmp6pijt18p/zutexetugudavolugubiw.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p9cdnl74974slqh93ca52k1uj3/tesip.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab261c875f5---57765206999.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/72821044061.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/nawejemuxezajavelexebolu.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/revow.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/2a099fd46510be3e0522d935e13beadb/perafagudedul.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210527211653.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7302a510c3---71937882778.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/013f47aba86c00f5e8cc5a217291915b/94797348827.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160afb14e2d667---33776368696.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c27ff362544189f009f1d0f9ebe50682/jexutiwonu.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1cd38baf9---77337412499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=description+meaning+in+bengaliPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016114.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16114 24612 bytes
SHA-256: 7aeb8a6f2ed7919eada0a5ffcf4e5bf356cd3989312206394eac55ee048763a7
font_00_sfnt_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 3640 bytes
SHA-256: 4bcd8d676c46e2e43e8bdcf8089d9e3622ceb8a9fb4565ce64130df0dff4ffe4
font_01_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 24784 bytes
SHA-256: cd4d7547a07970e9b76d2ab7bd319abae6db70501c8a27c260b62cb6017e43cd
font_02_sfnt_off00014903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00018cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC8 10856 bytes
SHA-256: 1b51d297cee02276631e87ecd4e0aa6b667def1aa6d94510c88cef5d7deeeb9d

Open this report in the interactive analyzer, or submit your own file for analysis.