Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04350ad38b341c9…

MALICIOUS

PDF

70.3 KB Created: 2021-06-10 01:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f23fce1efd8d4fbcce43586a891db06 SHA-1: 69e31b3160c05c1ccd61b58e0da54fd351cff245 SHA-256: a04350ad38b341c97a28102d67aed9e0ea2485a85845d78356df474a0602f8cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or scam lure, indicated by the presence of numerous links to potentially compromised websites and a deceptive subject line related to 'Os x el capitan usb'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or exploit kits. No scripts were extracted, but the extensive link farm points to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8132

Heuristics 5

  • 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
  • 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://smidgel.ru/uplcv?utm_term=os+x+el+capitan+usb PDF link annotation
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091687c2308a---nefefuretoj.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e41c4eb0da---741505725.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/gomajab.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/letusigarowufebizexuxu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16088c49b5f7fb---73706026224.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/nasorilifew.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/73108034948.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb59fab0b9---46108549011.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160774cb716137---balorowofetimapo.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nonedazanonuxom.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/60283174295.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/25f39f87e8a86bb099e9ab6296a2c8fe/tiroxibirevevez.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/enah5k5qicfead0hdqmf8fo08t/bamapese.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/55bce5f52d93378ac48f559477b4c4e7/34642304077.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/76667284372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 5064 bytes
SHA-256: 48fccf9584ae32eef058bcf93dd38a7a3f331fabd9c44684bd83e39e98a3aed7
font_01_sfnt_off0000f8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 10740 bytes
SHA-256: 7297b91202851713f05dd06bf8b68ad95b1f2c622039bd704c37cab1a3497485

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