Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af20285e4ec04b1…

MALICIOUS

PDF

109.3 KB Created: 2021-07-03 08:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 76ac0daf6c838ec255789761809e9414 SHA-1: d00a0967ea5b953bc4fca7d70e7d35791efef15a SHA-256: 9af20285e4ec04b15023c70e3d519e48ede6f572996a4a3f183e848f3837d408
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or redirection mechanism. The presence of these links and the overall structure point towards an attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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://huntic.ru/uplcv?utm_term=meaning+of+churner PDF link annotation
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09b082fa2b---13167724683.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076534c03e5e---gutanejile.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/7289701623.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2be1550e5---22574403458.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/31572462806.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a8rogt5jhqafkls9vok1i520h1/15804602641.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/41304528701.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/lelimenenamis.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/86109598527.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf5e76a62b---40797821235.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160825f6ddcf46---zigalamexasesew.pdfIn PDF document text
    • http://yuha.be/_files/file/20627875574.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95a295f892---23203802905.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160af86a76bbc4---popexojesawutelo.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/bemifuzilopixepe.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2090ea30f7c0d78248d80556d4b2e558/5146620182.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6a76abb82dfa0ba155e4923d24b14433/11074873404.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/kefemenibavemuzagakowopo.pdfIn PDF document text
    • http://weingut-suppan.at/files/18966530876.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/87576090984.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072fa88a5b42---65041447066.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/kotuxegisi.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/ninaji.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/lakesatolarenulu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00017981.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17981 24844 bytes
SHA-256: 8e3d9bc22d15649c9e0f56d156b20d8eec195bbec8270ab57ce2ad09d1bd26d7
font_00_sfnt_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 4980 bytes
SHA-256: 68e019ba0afd6ec5dd25e8cb3b3460553052d0189ae5f536b37bb85c2d10182f
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E50 10396 bytes
SHA-256: 2fbae6a3eedb29ca9c1668803cc4a20b5c0384ca505147c569ca1c5655cd3946
font_03_sfnt_off000135ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135BA 28432 bytes
SHA-256: 3971439bb834dd0231d7b76e50f373e1b7fe79a49c0e58f392955db28a58a4b5

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