Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7488a8450ec9347…

MALICIOUS

PDF

78.5 KB Created: 2021-09-09 19:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4d3d2278fc20a19eb460437ba88d282a SHA-1: 4633863a2a71b53f5b61775e1122640e67ffc3ba SHA-256: c7488a8450ec9347b7748947d59efdbb58f52479d623e029f86e0da578505b4b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, many hosted on compromised WordPress sites, reinforce this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://residenzaeden-albisola.com/userfiles/files/27797508864.pdf In PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b49180390---67898641284.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1613567815a53b---momasosudosofaw.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/mobefazimonujipale.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/wasanexozuwosodexarab.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/zakusorefapiganatebuvak.pdfIn PDF document text
    • https://pr-dienst.ch/file/wapefujitub.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/38691832455.pdfIn PDF document text
    • http://chamdure.com/DATA/files/zilorilip.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357a8af383f---nodiruxebifafolumim.pdfIn PDF document text
    • http://onlinevay.com/upload/files/wukegisew.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109050445423747.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/a635a356a9514e6f024c627ccb343573/59829973212.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/96039941935.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/reboradazajasajapaki.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/22258243633.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/47396849082.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/mukoxakexejebepaturipij.pdfIn PDF document text
    • http://kaies.net/upfiles/file/98485722762.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/54750168506.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613665580138e---79271276368.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/wapitewunetepuwelu.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/41452648943.pdfIn PDF document text
    • http://symbolfoods.com/files/file///87979758974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=pdf+printer+missingPDF 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_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 17928 bytes
SHA-256: 90990cbf0901cfa5ff5abe59c88e91a676316472f11a8c74e3b82235d6c9eafa
font_02_sfnt_off00011484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11484 10516 bytes
SHA-256: 2fa217623f5090d7f45e620a891228e34935197aa8e2f906dc32e4c9fc1fd92e

Open this report in the interactive analyzer, or submit your own file for analysis.