Malicious PDF — malware analysis report

Static analysis result for SHA-256 360d05cd9e563abc…

MALICIOUS

PDF

74.7 KB Created: 2021-09-03 20:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 580bd4ff3d9619bf45443a5e10094dd1 SHA-1: f9fd7048c0287b0f199961d06cc24467e446c25f SHA-256: 360d05cd9e563abc18dcaebccb00f95304d4f66c63737a6916be208f449370f8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely contains an exploit. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the heuristic firings strongly suggest the intent is to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://medvor.ru/uplcv?utm_term=kenwood+car+audio+manual+download PDF link annotation
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5gsfc3ra088j3o05frmd9aoug7/71029929560.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/gonivezevizesiwim.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088571622cdb---zilepofejulefeko.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ede6cb044f---72384023175.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/12206191107.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/37ee754137b2f649eea8d151c24af78a/zutunigebalit.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/dinipufagidutuzisetewoz.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/rgeml22b3c3g1sei46jgtnh4no/98348557435.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/xemerarok.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/pejuregekewetalorugabe.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/6d70875e890ff208463da2cb9ff16924/23906448873.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/18417242872.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/26870979964.pdfIn PDF document text
    • https://hoavily.com/uploads/files/41004352241.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8348116b6d9e078b60608a8e0f8a07f1/86883691996.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/nitutametote.pdfIn PDF document text
    • http://alltechsro.cz/files/8794434836.pdfIn PDF document text
    • http://ledins.lv/cms/file/nifedavej.pdfIn PDF document text
    • http://rapet.hu/files/puluxugezogexixozubo.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/nejetarepir.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/61321091714.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798204cb628---56537533243.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b5b93d1cf6e5c84c03051c2e5d537453/xamebomakijaleb.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/25674779320.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7edc64a86770ec0db889360e514fe1d/pofuzomananekuwubopebideb.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_off0000c37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 16428 bytes
SHA-256: aa9a2ca76db19c13c2bdcef79cc87c3067944d80e03160c8b9e86013cf41866e
font_02_sfnt_off00010606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10606 10440 bytes
SHA-256: 3ab4d7f6c17f4e9d4a5df8b686b26616ab9e2653fbe015b778a60f32169e8fce

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