Malicious PDF — malware analysis report

Static analysis result for SHA-256 1560e68b8f310ef6…

MALICIOUS

PDF

85.8 KB Created: 2021-10-10 22:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f92047d6b3e5fadf020ad54311a10aa6 SHA-1: 1765079b9bc9347b9eaa68cc8e654717dd828d59 SHA-256: 1560e68b8f310ef65516e55d9a546c55f25b242c7df9ce3df8c95c6be6d4e623
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the extensive use of external links is a clear indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://crewmak.ru/uplcv?utm_term=what+does+black+panthers+eat PDF link annotation
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210923061001.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/28456752456.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/koxasibula.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/073c398522e3db4b97a24035a37794eb/tapukoki.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d3eb4480c0e5a97d9bf9c1bf17741e3d/pufolagupapuwe.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/491c268e45beb7fd1700daf7603e5a59/12152433241.pdfIn PDF document text
    • http://nscenter.cn/upload/files/femokuwujugu.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/86739546548.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/8a2a5e4cdfee137e8737ce3eaeb5bc90/90024588138.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/77506998352.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a005bce75eba86c58b4f0fbb73ab09a6/5634570569.pdfIn PDF document text
    • https://agermag.ro/mm/file/gofedifemataziwejakuzo.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10366033505.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/wurevafiwidusijigofiruxuf.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/6895414249.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614456c71c965---jisubesonozago.pdfIn PDF document text
    • https://razredna-nastava.net/files/foputitafowavojuk.pdfIn PDF document text
    • http://fruitvita.com/files/files/xebetewojerig.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150aed13be0e---97291791749.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/50519778022.pdfIn PDF document text
    • https://paramourpourbebe.com/userfiles/file/90750344462.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/55231762680.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/f7fd918f6c939f3045c20dd8735100d6/63924676161.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/rogaxamupixijunin.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210916_23DE27E47791D646.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 19712 bytes
SHA-256: 004dfa5f2b6e0ffa8a30699093beaf8945a018efad25aab2ccbffceee45850bd
font_02_sfnt_off000130d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D6 10744 bytes
SHA-256: 35bbb6905017169fd1df9856ae1fc99e9b61473123fad214b621a5aeab2e53b4

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