Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ed7b232ce10477…

MALICIOUS

PDF

89.2 KB Created: 2021-07-27 10:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 23869b32d56083fa0bbf13880459650c SHA-1: 6ebac48dacaff77466da7cf1f6078018b1d50464 SHA-256: c6ed7b232ce10477f510054ad21ab11c3f4738798716d6251c00a70d4c7e641f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://quanhoangtsi.com/upload/quangtri/files/xamimozad.pdf In PDF document text
    • https://samtee.com/admin/images/file/61538630888.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/72968404481.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa09dfdbf44---jotod.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/medirofoguzim.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/c37592ca61a3c504a58d2d5a06b23d0a/98248430234.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0175423ed---rifonen.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cf9fc88a46cfbaec73fea45e37f3c8a/puzamabakimam.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609456ca8e68f---93118600152.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/d3c2f48622613f576ca50aba19eba07a/35067888554.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608034399069a---fojuxivizodipigupig.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/aeb31d5ec23686319081f5f0933a169f/11527416501.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/fi722q9mkb16b6hnq91ue71qf9/vifafidebejorewibinumiru.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/95986849629.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad785668d1---duravisepovovukolagazu.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/51947177827.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/50461970505.pdfIn PDF document text
    • http://bronia.org/userfiles/file/rutoj.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/kubetatemobadop.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/a5dcf9c596668415a2c281a5499929b6/mipesokarotorinovawupib.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6ce74c7926986f93a320837e8dc67fcf/57834267261.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/lubupo.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/21654333291.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=is+ikea+discontinuing+malm+bedPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 17796 bytes
SHA-256: adb8e8b4516c7d36ce2baa82620b0072636bbb1e0e1417bffb6bd057158ad386
font_01_sfnt_off000126c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDA 10896 bytes
SHA-256: 49470c43600c37b37db678dc7acaab3bd68b629e9be1e596eefaa732e5fd6dc5

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