Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b29bdcbffb4330a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 08:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c7d11bf361e11a39cd6b565d14974c2 SHA-1: 2acc5627fa0bc9e36985b129a4607b9531c74962 SHA-256: 9b29bdcbffb4330a0e6d0a459fc033e7e55ef4f7d7baa496365491288c29b407
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that the PDF is likely intended to redirect users to malicious sites or facilitate the download of additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://entone.es/wp-content/plugins/super-forms/uploads/php/files/4336ca316a373b785b3cf0f36607c2ac/77445349908.pdf In PDF document text
    • http://mp-journal.com/media/file/10825398361.pdfIn PDF document text
    • http://zeci.nl/im/image/botigafosoxobegirogoz.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/lerafan.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/dd971220c490b980912081a8af2fec11/wogixoki.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/720e5909d957231156e62e2e962bab82/9970832424.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/31528039909.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/c5c9025784f5855799ee98e639355b92/53164032138.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/57240034611.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/96gpksd43l1u772634f0rgtbo4/fokiwudapiruvokuliluref.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/83106714701.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e15fe2a9e2---42775946491.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/xidetezatolavuz.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/49738208147.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/6d9cd425974d06580c2b4cf9c8cf24c7/58956173051.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/1468469494.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3f35c0ef4---69720158094.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/41bbcf1901ccdfb21dbc808d2200a7ad/93237599163.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/54810511143.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/c8faa7f14e82d027afbbf76a88214a28/26249293942.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/61368358216.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/25699d3932b8f81f87e136d515cc2be8/dodadumiwatomazobaw.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/dakote.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081836d04f76---logezasixekasudupumonive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=world+religions+crossword+answersPDF 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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 17744 bytes
SHA-256: 265e27caa4e1b3560c9346e8998ef73d537b35df15a09370ef33bc0428d9e064
font_01_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A4 10524 bytes
SHA-256: 259c744cc2d42b8e9343639f4c1f19bd70677ca89ac5001856c2c481d4de6c91

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