Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65da9050a2a2c8e…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 16:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 99eb5e29a569419597604dd6fe9b32c2 SHA-1: a90856189fa5baefa450db257797d03284a46047 SHA-256: e65da9050a2a2c8e3ce3455ec4034184d736e2cd537a763882be6922baf8f2eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ML classifiers as malicious. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to solicit sensitive recovery information from the user. The embedded JavaScript likely facilitates this phishing attempt, possibly by redirecting the user to a malicious site or displaying a fake form.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/ed7974f2871dae9b4265d21dbcb13824/77238755025.pdf In PDF document text
    • https://wasael.com/userfiles/file/ligogatafasitekajus.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/89520812718.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/33834588746.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/69157634353.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/zibufidewinofabore.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/41119051758.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/sowawakotalexipuvavi.pdfIn PDF document text
    • http://xfswchem.com/upload/files/bakamugusarepepi.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/munumujijevu.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/60918116912.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/monigavesiko.pdfIn PDF document text
    • http://sun-tes.ru/files/file/sugufugosatojajikat.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/dazemomuzagapuj.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2b743f5bd---87089185184.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/wazuzexozuzikax.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/govejemabevidisukalomi.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/perimoba.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/nafegozanibapa.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/kasotufakirisujejale.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/4071285558.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/pelavoset.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/lajagidipumafugunujope.pdfIn PDF document text
    • http://djapm.com/userfiles/file/puwidojilijenezokovarovis.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/texutorafewarejudofogu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=adb+pull+helpPDF 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_off0000dbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 9868 bytes
SHA-256: 0e65b6d95eed6652994570bbc6316710a46b6bd568295c2d836cd87c110d0acb
font_02_sfnt_off00010956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10956 18412 bytes
SHA-256: a51df3381264a6ed0945fdea8d9cd695d66057f1f83a360a38b0a2cbd0ba9a70