Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6e577d0e22f37c…

MALICIOUS

PDF

73.1 KB Created: 2021-06-10 22:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2ef886e68ac1761df1cc25c98d670564 SHA-1: ed29af52556fce6248ed733946561ff466a8531d SHA-256: 5f6e577d0e22f37c429918e738fe8b50b40eb0dbe694b7e19e5ec0a50bbc7e2b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs, such as 'https://catamma.ru/uplcv?utm_term=miya+bhai+geet', are likely used to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=miya+bhai+geet PDF link annotation
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/m5d2q7eq32dtt3botn4usmbi90/17911557889.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d3603f584---35639670850.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/jon203s8jmi9cabh5gtgfvuk71/16143049654.pdfIn PDF document text
    • https://pcstaiwan.com/ckfinder/userfiles/files/7713981173.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebeea41961---46624628021.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b968dfd68---4654664504.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/5a6ab43f48ed55a4b20f70cc63ab2c33/mobupazodujekufif.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608522b2d7bb4---78064707776.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/88469102769.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/35165762343.pdfIn PDF document text
    • http://funperm.ru/content/file/tutavebonezepetojune.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/miles.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/18c68bbbbf9635f9c38be6687c85d2ed/69404756507.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/9277408a03460ba0ffef1e0dfdb1f086/pafugumuzifikavuxobogigun.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/lokaduxiwujumeg.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/iaotfkd5l442i9npkhc2cbn5j3/1556069938.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e87f4975ea---xokuxasakudawiw.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/r0suc0cr4l2jav982ipvb2i8gk/95112667827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 4888 bytes
SHA-256: d96d26824beb3bc1a0feaf85c8346ea905024503b349140fb7afa4005dccfe1e
font_01_sfnt_off0000e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56E 11356 bytes
SHA-256: d0121aa7d4a26b82ad106ef21a85d4ee7183824317e7b035092b6870249ce6c8
font_02_sfnt_off00010c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 3052 bytes
SHA-256: 89b447047c9fec707d50cfe54c2527fd0ac4992661c8d0e6c71ca2809144105a

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