Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce02a3d43411a7ac…

MALICIOUS

PDF

93.8 KB Created: 2021-09-18 06:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5970a16f256e8dbab2a339e0491d23b0 SHA-1: ebab6e9e9cb81fa2a68cbbcaccc0353c3df24b24 SHA-256: ce02a3d43411a7ac2be41af883ebebb3b7afd11743db13fad604ff533d9eb0d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, including one pointing to a compromised WordPress upload storage, and another on disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://oniceh.ru/uplcv?utm_term=4fun+lite+app PDF link annotation
    • http://gutachterbewertung.de/userfiles/file/papatulozoz.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/90244284152.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/lafixijibuxatew.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/94707068303.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8ad778672---47966192648.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/pebubow.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/16293317150.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210914085325.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a181007c---xobizorelusep.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/12926573956.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fd04efb79---66322570103.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/pawukipotasogutopusurusur.pdfIn PDF document text
    • https://hoalavender.net/upload/files/tonopojivil.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/40867692263.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/77478322888.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/85108473969.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c91f90e08---67167067885.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/ranozuwuwudewotuwuwe.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/25754879855.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/85314300062.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/jodan.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/pefodomozojuradamegeralaf.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210917162713.pdfIn PDF document text
    • http://vitcongiong.com/uploads/files/25535862637.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_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 18492 bytes
SHA-256: 64354bdf20a7984cb3136c426b07a7cf58d2bf97381014dda3d55f00507602c0
font_01_sfnt_off00013b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B67 10044 bytes
SHA-256: 36ea5b07c22550ee71501bec7e3720102a8a90e7ccfbb5c69799992c8cc7f324
font_02_sfnt_off000151d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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