Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12e8222a67c2e18…

MALICIOUS

PDF

71.1 KB Created: 2021-09-24 13:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: abf5adffc820932e5f22ea326d7c7f07 SHA-1: 0e7a062c179b1b00de873c8b65d1867310170714 SHA-256: e12e8222a67c2e18fb09891178e7db3d86c06b054e2cc3fbdd41fdfb3dff7be5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://synerhu.ru/uplcv?utm_term=pirates+of+the+caribbean+3+tamil+dubbed+movie+download+tamilrockers PDF link annotation
    • http://vektor-bezpeki.com/userfiles/files/96513182407.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/50136153161.pdfIn PDF document text
    • https://stockbauer.hu/uploads/file/sawonovojesefakevil.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/oip481cbqf25pe5q1lo9qlt3ro/49473243747.pdfIn PDF document text
    • http://fructusartis.com/i/File/labuzov.pdfIn PDF document text
    • http://sissonne.hu/editor_up/91564443635.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/1843802376.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/18609170317.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/20852976988.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/xivav.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/fixawobake.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/roxirobedejodadaximow.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/wapepadigipenoxap.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/padobawibojajirizodizefis.pdfIn PDF document text
    • http://myredm.ru/uploads/file/19442984310.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/jelelixiwone.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1613b90a6dc1cf---85639842974.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/98398412686.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/37889270971.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/vidugufevipomusurilegit.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/kusakagemumo.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/955f305676fe2029bf29b82f37487d7a/gugukuwebanubogeko.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/zomidajedunuze.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210906163090923639.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/57610365624.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_off0000b413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC25 15484 bytes
SHA-256: bc182bd06f6a669e802a1b82339dd5c03418e062064250f20e7ae1e9b569b19d
font_02_sfnt_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 11396 bytes
SHA-256: 015f20c8ea7414481b5fee585e31bf75900b6756336f594dc51bbcba4782744b

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