Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2ab1aaebc68365…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 13:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9202f20f46f0e4b9262ad05ffbb9156 SHA-1: bf0e059cdb3a16973e0c378fe35d4c21e9c5db37 SHA-256: ea2ab1aaebc68365b297896c9edcee6094dc9be4ee7ae9b3df3026b89caea6a9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a pattern of using many links on disposable hosting, common in phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.sauminandy.com/fckimages/file/delopebadevajakisubujem.pdf In PDF document text
    • https://thefertilizergranulators.com/d/files/fivolob.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/78589229887.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/95329441124.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/96559530635.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210912150307.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/gukajaso.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/78666630222.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/07/file/20210907_123720_110.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/63535836793.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9520158df---13874677918.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/wezorakelotuvov.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/kepemenogibavimosege.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/84659252387.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/zavovow.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/ramutufijikon.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/92482435806.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/gopeboxuf.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/dawisidiz.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b4f0a693cf0e4834a15c289d244183fd/getumugegu.pdfIn PDF document text
    • http://safarang.com/basefile/files/gesopurabewaxeran.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/dukezujusi.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210918_E4DF8A18D234A45F.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cast+to+tv+with+vlcPDF link annotation
    • 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_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 10172 bytes
SHA-256: 8e0e73d4555dd915f5f5ea174661b0c8fabbd34c8909f2b18136986787cf7c28
font_02_sfnt_off000116d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 18448 bytes
SHA-256: 6685c3846968a4714cf28e6be7f0bef8c14baab57fa0479fdd7ff85bff10f954

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