Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27e9cbc907c1f46…

MALICIOUS

PDF

85.0 KB Created: 2021-07-05 02:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 070658d48a33a867ce7822e3ec5c7b94 SHA-1: 174c56ef403529f123a6afe07a6dd3883da74a6d SHA-256: f27e9cbc907c1f46c5452de290b03b9a899b5082ff3bfd4852b27f8e74f31d1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/26cf3bc109cbae4f156edd69315af269/6029137344.pdf In PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9db348dc84---gerejafegozekifag.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/sawopamuladoj.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/lf468rr0hsnf0uomhvajgsap1g/dizolamagirizevumemek.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/36350047160.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6938c76dd---xowonuzaxeke.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090827d559ab---xebalerekozosanav.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a619097232f---fukekalozuguzakabu.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/wubimutewikan.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160de556989e87---jexiwalovonikatola.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2fd3e5eb0---nubeguwirepamami.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/09drtcef3uqe0ooh6m063j9sge/48450627315.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/48889250304.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/88327416471.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965996f20d7---12388779160.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d3c24c3a0---budogewobobemiloj.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0a98eaf78---rojivezupaxewir.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-28/20210428234618829175.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/80223990524.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/16460865662.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a9362bf0c4d---lonuxusa.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c50bb845ce5f1c2291b019dd8b7ff60e/96455224570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+find+normal+unit+vectorPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 18616 bytes
SHA-256: 668985b37b4dddc68358d1486dba0607301efb70252288c0761ead480823e7b0
font_02_sfnt_off00012e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E84 10712 bytes
SHA-256: eb6308189a7ce2252bea7d46a872dc31345921d04df55bac01c1404bbfeca3cb

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