Malicious PDF — malware analysis report

Static analysis result for SHA-256 079a67a7f382de3f…

MALICIOUS

PDF

40.1 KB Created: 2021-09-19 08:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2aa19fb7afbccaeba0311ef2ef7077f8 SHA-1: 5e796e7ed04ecf813aabfa5bf28801692fe51acd SHA-256: 079a67a7f382de3f6374c27799d19073f99b125bf54cf8c43e8c719ecc626ae5
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. Heuristics indicate it's a link farm hosted on potentially compromised CMS uploads, suggesting an attempt to direct users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9455

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://hoangphatdanang.com/uploads/image/files/gabirinasewarodagubovusux.pdf In PDF document text
    • http://thegioioto.store/upload/files/84402103264.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/61475373332.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/fadepokegokol.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/fozobepukofesa.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202191002804046.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/1221109236.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f3ed3f826---pafatusunagibo.pdfIn PDF document text
    • http://saint-party.com/media/file/folikajipekefa.pdfIn PDF document text
    • https://databaze-zdarma.cz/userfiles/files/tugazakegivulagazefevibok.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/zebadigimami.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/bavarupokuvujalewe.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7nro54jv8484h43mbrofsll2t0/nidakotukikajixesowexubu.pdfIn PDF document text
    • http://apicn.net/upload/files/mavudexuluguxebeparoget.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/jogonugenajevolon.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/6432201405.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/83859735599.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/lipebozurojera.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/90332958970.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c890dc25c1---80801959476.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfileIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=reverse+geocoding+android+studioPDF link annotation

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