Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e164229acf5cdca…

MALICIOUS

PDF

85.7 KB Created: 2021-07-19 00:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ea9230bcbd8318b6bbe06820214e511 SHA-1: 634b07de158bae06c4de5ec4ab81c27b45d08e3b SHA-256: 5e164229acf5cdca3e0a770c077e7c1639894a476211dc2f329250a1dbbb6438
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues about its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/c87bb34a7f5b0eb2ab3d239cb6dacb08/moveda.pdf In PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/29283fced37576c902f8ca48bcb498e6/97518103670.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/f7e15kqi39qtd60rfne7mrrhgq/51193929855.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/mewederolajorupuramole.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/e202aba7b09213a75f0e0373e7ea233a/jovubuwiguxosigobeb.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/j68puoqv88871dfdpgcr8rhucn/sofus.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/barez.pdfIn PDF document text
    • http://master-br.ru/img/file/71054865535.pdfIn PDF document text
    • http://ladue62.com/clients/2/2d/2d0487a90c18d3a1b3df44839405a665/File/36190104146.pdfIn PDF document text
    • http://kaies.net/upfiles/file/37923666370.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/53126436489.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/fufikiwizuxozirate.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e958d91be4b---25836827027.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc7f97b5f6---rozevatagifaziwadojizimed.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/97a94da10bf387b495a967ebc7f96722/2700236325.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b87d042419---tubezizoseforo.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e68e7c1883f---jupubenesivanikilirugepuz.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3f258763---38889028901.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/hhdk84cb3a5p2irakd62octo94/toxefilobiguzikafol.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12fb3c9190---10861137868.pdfIn PDF document text
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/95577017697.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/23ea4075ea5e78798a70bed8bb6dd41f/23070908345.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/280e00a184a46f858b225953d6190e20/63036939407.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f24f2e538ab675ed69fd0d83e7f6e386/14454380430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=niall+horan+drivingPDF 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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 17568 bytes
SHA-256: 31272820952f3d89b4b29debc5650123f0a0ef5dfe14d51b360108f6de41262f
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13386 10172 bytes
SHA-256: e40afa909a557acbc36fdb7a6b8cb815c056159f61f89f713a63a2168514f176

Open this report in the interactive analyzer, or submit your own file for analysis.