Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab109d730bef53de…

MALICIOUS

PDF

86.7 KB Created: 2021-09-14 06:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a2a1fa43d4fb7a1856deda9c015c7005 SHA-1: e7cc605b3ebe8323886b3b1b0db4ed0ec94233dd SHA-256: ab109d730bef53de265e51971aeb2686ca5ac4e97b0254a540ee146816883d62
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a download button lure further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • 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://sys-svinding.dk/userfiles/file/mavedumemenonexa.pdf In PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c63fa6a47a---lafenemavajafiva.pdfIn PDF document text
    • http://coconut.hu/userfiles/file/bibowefovafatujijeruxulox.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109130038174968.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/kuxemefapawokirinezux.pdfIn PDF document text
    • https://lecachet.fr/docs/files/zulesijuminoxovuginebud.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/67928689946.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/23619302015.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/75017480790.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/fumefi.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/54217981675.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/26185204974.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/rivisu.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210902_101855.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090916041964.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/93534276184.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/65585634093.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/xusoberotarorigabun.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/75078187065.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/nibisululixidemud.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/64283273794.pdfIn PDF document text
    • http://exosushi.com/uploads/files/wogivasawoxawaxedol.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/xipiwabuto.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/59590806723.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/pujowokalefebibososibul.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d40d12be---fisiwosikipa.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/9784879801.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/13152526607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=download+gta+5+hack+apkPDF 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_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 18548 bytes
SHA-256: f0884e8d1fd5559ed9bab3ada950b0d1929cc5cd50eb2d702ccb5226518baeb9
font_02_sfnt_off000134dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DD 10616 bytes
SHA-256: d4feacdeb89b914411b193b6fd77fc084641d794cf02d3c681aefeae39167cf7

Open this report in the interactive analyzer, or submit your own file for analysis.