Malicious PDF — malware analysis report

Static analysis result for SHA-256 5506ef157cb74d82…

MALICIOUS

PDF

153.2 KB Created: 2022-03-20 21:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: 9b1a89453017cd22962595043a754661 SHA-1: cfc197112ff7dc279cceb5961378eb32cf1cf1c0 SHA-256: 5506ef157cb74d8242c066f9dfe86522a738f53850f232e74fa968768e7c2aee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body itself is composed of these URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8092

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://lovig.co.za/XSRYdR1H?utm_term=bootstrap+form-+horizontal+vs+form-+inline PDF link annotation
    • http://cdenito.net/userfiles/file/87097175508.pdfIn PDF document text
    • https://cserepakcio.hu/xdata/file/pubor.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/tobozepoguxokalo.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4de6f7486df384ceabd067a41a0ce945/zazenujikikavalivev.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/5082538937.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/ligexujazarifivisabuxoxis.pdfIn PDF document text
    • http://privatmajo.sk/upload/files/63331330727.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/wifalevoxetonobodosulu.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4bd901f43ebcfc9da5e41d51eb020172/duvewixumununelepeb.pdfIn PDF document text
    • http://archive-2014.humandoc.pl/attachments/file/89492936764.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/jamoxezaki.pdfIn PDF document text
    • https://dreamcatchersdoodles.com/userfiles/files/raxaped.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/35045226093.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/1949126590.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/59986ffe208d0168e50f1eb2c97b3984/58742396704.pdfIn PDF document text
    • http://hairandoil.com/uploads/fefixebeloregaj.pdfIn PDF document text
    • http://journalstudiesanthropology.ro/adm/jsq/kcfinder/upload/files/96793204298.pdfIn PDF document text
    • http://detoverfee.be/webroot/uploads/files/xutozenevakodanuragawiki.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/41438170021.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/63457138891.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/40494239243.pdfIn PDF document text
    • http://silexsys.com/ckeditor/kcfinder/upload/files/14095020554.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/17855409800.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/60760637952.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/tiliwo.pdfIn PDF document text
    • https://beyondmywalls.com/data/files/70033404017.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/fujudikogikutemikegaw.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/zivefomibosepoxiruvo.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/31022438598.pdfIn PDF document text
    • http://syscall.com.tr/panel/kcfinder/upload/files/40418230889.pdfIn PDF document text
    • https://mannlicher.hu/admin/kcfinder/upload/files/wikuwafuzixa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/855bdb02b86713b94de89aba42e79882/lofufuwejibinukozuka.pdfIn PDF document text
    • http://yztools.com/images/upload/File/24873774564.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/42845593375.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/8427382190.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 extracted file (font_00_sfnt_off0001f3a7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0001f3a7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3A7 10836 bytes
SHA-256: ec022c2278eb77665b58fe3fdc57dfbff5adcb5c631d8c4206bf8112adcc50a6
font_01_sfnt_off00020c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C9F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off000223ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223BA 18556 bytes
SHA-256: ebb45912f50f231bab10a03e7692895a380027143def754399893718b4cae8c8