Malicious PDF — malware analysis report

Static analysis result for SHA-256 1441170fc0643d72…

MALICIOUS

PDF

85.9 KB Created: 2021-07-31 15:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 6abbf170f0a51ae938abd6a2ea978f0e SHA-1: fc0b5b1429d19eb145ff577194adc66f12a1cfcb SHA-256: 1441170fc0643d728edf1b0fa4568370c615a850aa614828586d8868cbf51ca5
154 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 0.5921

Heuristics 5

  • 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
  • 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://coretry.ru/uplcv?utm_term=how+get+free+money+on+bloxburg PDF link annotation
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/9iue0tljv3e79l3mcssajek0eb/bupomivuweben.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/43164523862.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/784i21jh0fq52f8sdop5tpcth4/zazudijaresusaxexevobolof.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6b2d00ce---80793481277.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210719092450.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a500b21c125---tujipibomidimojapip.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608018791862a---likusumefowukosujexomexiv.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/12774978747.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36436df15---sipofoworoz.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b964b786187---gibutirenisomokawema.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621452167.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/25972316013.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/narekopidi.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/geledudadulasufalupas.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/74921967390.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abc28faff25---15821969082.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872ae9ea73d---23174987210.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/kovizuvig.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ab25906b9f3---53383504254.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/bivodowajurowitebalo.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a2b2cd21e---2302340597.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/falutovozefid.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/duxewalaz.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160767af758683---walewosebaxaba.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 17372 bytes
SHA-256: 32ce9df9c602645ff207df57273c89e45a1c9d435d60101e1c02188dcbd64d92
font_01_sfnt_off00013565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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