Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f900e96e321e79e…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 13:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c1e791706d6d8bb135839b2a5627d4a SHA-1: a48519c8024c64e787214bc9ecda6f5573f7f01d SHA-256: 0f900e96e321e79e0e435ab6f4a54344494d3604afc26d30883bc963e962af6b
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of link farms hosted on compromised WordPress sites or disposable hosting, suggesting a phishing or scam campaign. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=transcription+phon%C3%A9tique+fran%C3%A7aise+pdf PDF link annotation
    • https://alsharqcc.com/userfiles/files/zopuwejix.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c0e66f10b---49165945116.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/wejitowexikexaporalu.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/41911387306.pdfIn PDF document text
    • http://spiregene.com/image/files/20210717_220820.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dec7a53da125d22f3bd2084dfe1a5c15/36114559267.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102b68188a77---77302712229.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/28449641014.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e538279fe---80902220854.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/mokoboru.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/38500550653.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/devegipumumiz.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210703_073444.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/62784851905.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/n0u1pkmn3h8slpje2habcup9t2/7353924449.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/xisodedifativuwaseveduje.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/430b1af4507a54423403b6c3e285af0e/5116974985.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161057bf763450---55713081845.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/folisafinolakibava.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/40d6ab8e3811e69c61397b0a99e35727/92744366496.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/zerisimovotulekolizebopi.pdfIn PDF document text
    • https://tajeer.co/userfiles/file/lojazuwowanoloxeg.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/3f25bfb9c60f376031c6168a987d9531/50269991009.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/durenozurupunamug.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/cef901abc98e56d12636ca03f3d869e7/bozenafakaparepelori.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_off0000d652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD652 11232 bytes
SHA-256: c75c25af21a228749f9e0b145a75634aac77d3abd1f31589a1c2bd5ce93b22f1
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D8 23288 bytes
SHA-256: 3be202b2456f9d96b32027ce76ae0f6f8df42279c3b846e9d9e82a976919c34f

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