Malicious PDF — malware analysis report

Static analysis result for SHA-256 073029e5e447b28c…

MALICIOUS

PDF

76.8 KB Created: 2021-08-22 02:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8094946fecf037cb3daab403a241d842 SHA-1: 36a81bdcbe946f21c189c842be18099c1b0b2bb9 SHA-256: 073029e5e447b28c3de585f8bde786f68f59c22fb7b112abad5b2613dedd108b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or lead users to phishing sites. While no scripts were directly extracted, the nature of the links and the ClamAV detection indicate a likely intent to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860224715f3---72308805136.pdf In PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c8a7151c1962b6dee84931f74c056bd4/julapokijamagis.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/binajazoterag.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nosejokimawowixapaxovera.pdfIn PDF document text
    • http://xsjprinter.com/d/files/97804587065.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/21075127516.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d43b4ec37---zisiledumi.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608557596f1a2---15745905298.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/50353847576.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/44255703468.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/43767789720.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/65787921263.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c6603de84563fe5d172311c6f8601e94/31123657396.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/xorixabexumubufuxofojerit.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/16846944894.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/531evg912t4re1pi5afdkq8v4s/takiwatoxesipurugelu.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjfjmob8h57d4hr29r0tstlvur/82756460338.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9baa7bc9a5f4fb19b0e6e9309ee6cc4b/bafewopofapozatixodebid.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/zunafokujexutosov.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/75413469332.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d4d531ebf35a651fa3b449fb57d3b1fe/17543000964.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8cac0da64b6220350d6562a7111fbaea/70361541349.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/92247409943.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/11fb9b9c7aa24b431f84349472391212/gonesa.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bd2b37fae---26242093214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=makalah+tentang+pelanggaran+hak+ciptaPDF 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_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 10448 bytes
SHA-256: e1498f1b871274777c515d50ab92c3b9ac929b46607a77dc8992eb941690cf1c
font_01_sfnt_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 16824 bytes
SHA-256: 4eb2364dba9bf22a30edb467144d84ed8e32667b2383ca3e7f633b56b306cd11