Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed0f5008d18f0f8…

MALICIOUS

PDF

86.1 KB Created: 2021-09-17 20:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01e86d23ff8f6500b8429bed04c73711 SHA-1: d7204aa5e6de49f8cdf65e6ddcf461d22b7d79ea SHA-256: 7ed0f5008d18f0f89b42aa0183c137f920c1feaaa1ba8f5aac835fb7be4ffb1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to redirect users. The presence of these links suggests an intent to lure users to malicious sites for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=my+hero+academia+s5+e11 PDF link annotation
    • https://atamergranit.com/userfiles/file/titit.pdfIn PDF document text
    • http://bptramptour.pl/files/file/42878933529.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/23369195841.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/22270308178.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/98932728134.pdfIn PDF document text
    • http://ewtch.com/upload/files/88773889079.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/55866793877.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/12285538621.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b0f6b1b6171f7f02566ba630464d907b/zotanomejow.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/fefalukotuwuzopaw.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/gefupavedenoza.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/kugeletasejavizoruzutem.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326dceba9db---veboxedi.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/39313538016.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/zagewazejavarif.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/47101546463.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/41141651843.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/fiakrsan4mbkr99bgjpbccnl58/nifexosubizufosarogumajol.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/75563616921.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/xevusufura.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/kugiviredate.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/darulilutomuwobuparavi.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/vimoxunatoziv.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/46503918694.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_off0000e904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE904 18776 bytes
SHA-256: 9af07a3b96edbc9f277c76223e026b2c626bd217266765c7e813d1bd51a09d41
font_01_sfnt_off00011a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A15 10680 bytes
SHA-256: d4197d115ceb14192446ac2cc74dddaed11aaae3701df1d25c098e495cf6e3cf
font_02_sfnt_off000132b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1