Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5eb4759995196f0…

MALICIOUS

PDF

85.4 KB Created: 2021-07-07 20:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: afafc13c6a812f6f16cbdede992ad5cf SHA-1: bad342d89b97d31cd40ec7b0a2cc3c7254becce5 SHA-256: e5eb4759995196f0f1defc17eb20e8a4f539dc38698a634fa583bcb03d7ecf79
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicative of a link farm. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically identifies a lure impersonating Facebook with a call-to-action for a "free robux generator", strongly suggesting a credential phishing attempt. ClamAV detection further confirms its malicious nature as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=free+robux+generator+for+pc.
  • 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://mmckno2010.zkosuchdol.info/files/96706973635.pdf In PDF document text
    • http://soleilboo.com/images/uploads/files/36472817543.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcdca373b31---80630828437.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/80355715296.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9a2d2d74264ddb46a1a226c5e597f5a0/80885326578.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/11350305990.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb56395388a---kujozisotiguzeg.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c43140c8d2---8519616766.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/sufuba.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/85711454131.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/xuzixedufapujazobexeda.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload//file/51050406.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607975752f1aa---deliworonerewab.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/q8dkr630bpd8uvuqt4av06lo3a/rasodiregipodujujilewuk.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/14f77749814b86731ac50ea544f56e34/55928617525.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609990a4e0c21---sorovatomofur.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad83028e5b4---82774547099.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/tekopuzapavaxeda.pdfIn PDF document text
    • https://area5srl.it/file/zovivobolufoniro.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f82d19e72---71929861399.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/db736658e8a221a071cc0316e233a2bf/paraxiwukedujuped.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e418c7c29---navazewunapat.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/niteremorovenur.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e364161c1a5c803da02d8ab9f016fd43/wekex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=free+robux+generator+for+pcPDF 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_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C5 10668 bytes
SHA-256: 8837327c7184fefc4a0bcc61cf6749cce5df9c204d2b9e258d9dd8af74843f37
font_02_sfnt_off00011a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 17692 bytes
SHA-256: 043ecc6f7885f807d515eac3007f524a5b22ba0dcc85bb6a2b4943e4a715c1bc

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