Malicious PDF — malware analysis report

Static analysis result for SHA-256 978b89ef47134a02…

MALICIOUS

PDF

78.3 KB Created: 2021-08-13 15:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1b9b138b093094c35ef809831409f294 SHA-1: 6b06d0cc82c2f431169c2b4b30309c1c3891da64 SHA-256: 978b89ef47134a028349c1e01297be2facb13ca71c3ab1d48241dcee458a3fa0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains. The primary purpose is likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9683

Heuristics 5

  • 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
  • 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://cructi.ru/uplcv?utm_term=is+cheaper+than+dirt+legit PDF link annotation
    • https://esvigo.com/upload/files/26980625902.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/ab2c987fc2a4db62f8cef2c8a1a06955/268836765.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/vopinizimizebiriwazatisiz.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/0c335edd8d128792e553c95ad6e9a1c9/tufulovud.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808faa3a528---87383447310.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/turabosukudunupa.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/32891468066.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/pebidipanuwexigut.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b849c1a2aa---gelazilutuximetomex.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/fiwetutoze.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5f2663489---87343266571.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610df8329c89a---sosofubuzasaruk.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/f61eb8ffca33298320bf5ce35d204cf5/boraba.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/zimajigopirifetegago.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/88272343101.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/94529300377.pdfIn PDF document text
    • http://itfind.ru/uploads/file/jamekevoje.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/d026pvjgnuu4vdh9p7a3aroea7/vifipalogodeko.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/kupapef.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/rosavufafareperatunulat.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/neperirusaxenunoro.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/jagigipofulepumesux.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/6065882872.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/39945450bff40747c936a1d1dfe904ea/24721623213.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44B 17980 bytes
SHA-256: 5d4c3cc7c2459a2baeb16b42629007a2ce1d654b6c483e6b00e2ef8c99b9b9fa
font_01_sfnt_off00012383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12383 10624 bytes
SHA-256: d198dc7e49fb7ec73b3ff27f6b869d876eaf087299a086f07e2689c91e2997e1

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