Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e5c3cfa07f2aea…

MALICIOUS

PDF

84.2 KB Created: 2021-09-12 05:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07f64d16a531b8e53b34e09ba17ebdc7 SHA-1: 5d9c671e831709ba9c17e98527292a40119685d7 SHA-256: 96e5c3cfa07f2aea6018719897c147711c87e84228cdae6569a823a266c60672
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm hosted on disposable domains, likely to trick users into downloading malware. The presence of numerous unknown URLs further supports this. No scripts were extracted, but the overall structure and heuristics point to a phishing attempt designed to deliver a malicious payload.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://shinex-auto.com/userfiles/file/fabiga.pdf In PDF document text
    • http://stmrcstvm.com/userfiles/file/12163271357.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/9786406462.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131588153c95---vexov.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/sutusajutegetajilu.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/dilanexoriwiguwirureb.pdfIn PDF document text
    • https://coil.hk/upload/files/panakipijerekatemugizudem.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/jifaseto.pdfIn PDF document text
    • http://rem-proekt.com/f/file/duvuburapetosazuve.pdfIn PDF document text
    • http://dnepropress.net/files/file/danaminutekinorume.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/99dc664e372e84a7aa935d8097da6481/33410808150.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/65592072725.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/pefutilanifegipox.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/gasafelakiwokelu.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/3617232392.pdfIn PDF document text
    • https://geloracinta.com/contents/files/82053106991.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/57640883450.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/68264406685.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/38164871739.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/92741318257.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/500798243.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/simiw.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/gitefokejujewa.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/tugebimejodovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pogaru+kannada+movie+download+tamilrockersPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/degabotewedafizibubob.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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 17792 bytes
SHA-256: e599d00e0f8448a2c1e4d2c43f593e842aefcf169cef44f211bce994d1764cea
font_02_sfnt_off00012904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12904 11060 bytes
SHA-256: abfbb5e75a6f9f6a7b35781f19870bdb1c7d2046b12d4f4548664b4c4ce840ca