Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186d59810d5ccf2…

MALICIOUS

PDF

80.0 KB Created: 2021-08-16 09:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41a6b353cb4989e80123edc3cae4a507 SHA-1: 6c0728e40125d70a3cc2178f64036b2d3d3a53b8 SHA-256: 1186d59810d5ccf223a21ba9460feb7bbcd4350af3d12974f1dd0e5f20aaec85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to redirect users to phishing sites or download further malware. The presence of multiple external URIs and the link farm structure strongly suggest a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://laborke.ru/uplcv?utm_term=william+walker+atkinson+vibracion+del+pensamiento+pdf PDF link annotation
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/8iv4b9adfus8ds5a2dbv9qfgoq/livedobamav.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160f02af7ed876---tizijeferesupodosabajine.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/be1f678886baa76ce88fe7c9f37e404c/28875650318.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/85797427629.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/11184290160.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/nd9ufsdprmje0m8rfvo6n8cgm6/76200498638.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099da3b35c30---texitaxuwadadunepipuvibo.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/m2rqcmjeq82lnrg3m3dj6s8jo2/922278375.pdfIn PDF document text
    • http://maihome.hu/admin1/file/subipenefisu.pdfIn PDF document text
    • http://edeins.com/userfiles/file/60541994411.pdfIn PDF document text
    • https://datawire.gr/files/files/38424936288.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/90e7e9e055cd36f05ed0bdde4ad134eb/matibakam.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe203462a3---paxewurovezemurikikuwo.pdfIn PDF document text
    • https://webmenuplus.com/images/file/51261754935.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/fimiligetej.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/203df32c66fe04b93b5df68f7e0c898b/pobatodisike.pdfIn PDF document text
    • http://mp-journal.com/media/file/rakumametubukase.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a916ad619---64655251665.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16096f7fc79191---28302998900.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/79367798553.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e8fd2b4409b---rubexonovivejajovawi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606e69981c368---fatiwojajajima.pdfIn PDF document text
    • 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_off0000ce60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE60 11156 bytes
SHA-256: 067c399d399b16fdb2c68ca312bee72dfb25ca2a793dcffe9acd5fc306104875
font_01_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 18508 bytes
SHA-256: 32d2a8100adb5b7a2a4aa4744156766d94d5fde47c89245f4b8d3ab8f634286a

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