Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dce6935e2480f37…

MALICIOUS

PDF

85.1 KB Created: 2021-09-13 16:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a10195b453c23071911a28d76e47be8a SHA-1: b39950ef69e31cdb3a8d6e69a0625b4758dc8833 SHA-256: 9dce6935e2480f37a60af2176a62a4297d7881779d1167e2173356f20d6fcef0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of a visual download button and the ML classifier's high confidence score further support this assessment. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://allytemp.ru/uplcv?utm_term=pardes+full+movie+download+720p+bluray PDF link annotation
    • http://physocare.com/Images_upload/files/60319830391.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/39490336295.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/jiduvo.pdfIn PDF document text
    • https://noble-program.site/js/ckfinder/userfiles/files/50275938359.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/zekukop.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/tureresuwon.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/36275719419.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/desolekarexiwof.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/poledojibonemesusoje.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/dunerigipoxemagumov.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311da74009d---revasanadetedug.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/54798109558.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/91120992593.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/sebumokunu.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/702ee311a82f893f3cb4412ce3c9747e/33663774493.pdfIn PDF document text
    • http://client.diffuse.info/files/bobazapakexatitu.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/75203575366.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/70241313621.pdfIn PDF document text
    • http://live-net.it/file/dolugunogudamedowebarub.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/98064335255.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/51484501774.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/sudozojevexa.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/24156739323.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/63367016890.pdfIn PDF document text
    • http://coytex.net/ckfinder/userfiles/files/43540900206.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/38516632782.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_off0000e705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE705 17404 bytes
SHA-256: 4c6fbccbecf73f0ec7203656b9e4e95a3cdea46a7cc6e0353bbfeb66b03dcfc5
font_01_sfnt_off000113fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 11360 bytes
SHA-256: b6c9fb160626fe2e49901406b8b74249ec6ee5b09f316a8b569120bf58fad6c1