Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e213324c09e369e…

MALICIOUS

PDF

90.3 KB Created: 2021-07-08 12:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 64d825045fff8f7d840bc11026bf3f6f SHA-1: cc18a2a2739a610c57030c20e90067deee599a7b SHA-256: 9e213324c09e369e3158257db046eb587bfeb0855eb330f311e514cc505a6d58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=cathedral+knight+greatsword PDF link annotation
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff95ea9f26---77277326516.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608126653437e---kipuniferemapelozera.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12c65f7df---nawetuk.pdfIn PDF document text
    • http://canvangdientu.com/images/file/43897248893.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5dbcc1798---95017727322.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/sj46h0jg86eht0pmafvk4ucjmf/goxewuj.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/fc6de11d9897dd9d6e05c330060d3469/gejotudojanamugaxosad.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756678cbc17---togizegisagewimowevu.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/12517595792.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/e626d6c0aef907e248a0e737c8b59fcf/60408890515.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/31f9499de02d0c181303e7ba67237a3b/12288865928.pdfIn PDF document text
    • https://chemasan.lu/userfiles/files/matenegileduvotugit.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1594f02762bdc1c0c0620096814bb763/40832272976.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/xotamupenutowomubote.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/demixagumunaruxarokowaz.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef7e0c49e8---babepudobatopomusarawega.pdfIn PDF document text
    • https://werbemittelag.chupload/file/59970863773.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/56857173916.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160719c1e69c9b---zemusabobuzivobonepev.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acfc5c2d5aa---55445028045.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/70428b329ba9bed765e94f4a1469f6c0/tosujovujole.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/tolegovefaxufe.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/ddt6dp9gil614a8t1mjd62rqmf/lewiliketufukosadem.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 19312 bytes
SHA-256: 2562f08a6b3ce2d4c626442d5677a0e939fcec1252e63c36e9c3b167a6cdd5e6
font_02_sfnt_off0001299c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299C 10736 bytes
SHA-256: 84a9a58142420508a6abe6a1cd913c88947954706fb5e75246618293e233fe74
font_03_sfnt_off0001421b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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