Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968ea19a092afde…

MALICIOUS

PDF

77.9 KB Created: 2021-09-15 10:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8c08d464d091226616480363e1ec6f78 SHA-1: 8ef4efd2142712d6f983c6fc2586261c72527261 SHA-256: 2968ea19a092afdee467270c590469dcabcae226067b5b0ac92b7b827cd88b4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it functions as a downloader or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://laborke.ru/uplcv?utm_term=naruto+shippuden+ep+376 PDF link annotation
    • http://bitree.net/ckfinder/userfiles/files/nudagufodovuno.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/dirani.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/88918661530.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/1707652695.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/tijatok.pdfIn PDF document text
    • http://aven.su/userfiles/file/kitek.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/150274285.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/10078130182.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/99322157476.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/vajexobenosuwaf.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/gifakolonotip.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/30861405954.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613459c6a5dcb---zawitasoxujawavulitalag.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d44102f32---95545050998.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/86225799283.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/35721129636.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/fugipipake.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/famagi.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/gokujuvupowopipiku.pdfIn PDF document text
    • https://krossi.ru/images/content/files/38845588164.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/suwudameneraz.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_off0000c38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38A 10912 bytes
SHA-256: 725aaaaf44e6eef72bd72b8448105a6039ef56310f49d81a9555f04bccac1943
font_01_sfnt_off0000dcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 20112 bytes
SHA-256: 318fe2e9dcf8550617a5bc284d83ca5274821ef41f12f3f7c839ad7ed94ccaf7

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