Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ef1409eb66e184…

MALICIOUS

PDF

76.8 KB Created: 2021-10-07 08:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 65ec6d2ed6f1fd017686956d24fea950 SHA-1: 82df0db3afbc6631ae555b3027d59d3a280927a8 SHA-256: d9ef1409eb66e18482a04abf77eecc2284eab9324361eaab1ce0fd0ad25841a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains an embedded JavaScript stream and numerous external URIs. The heuristics indicate that the PDF acts as a link farm, with many links pointing to other PDF files hosted on compromised websites. This suggests a phishing or malware distribution scheme where the initial PDF serves as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=charles+lawhon%27s+trailer+world PDF link annotation
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/tugugusazetesatanaw.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334e63e85c1---78431207222.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/95193677519.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/57405183739.pdfIn PDF document text
    • https://andana.us/files/files/favagigudivore.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613906550c471---goduvibepajefepor.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/pufufusux.pdfIn PDF document text
    • http://taigesw.com/upload/files/mosaz.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/vofivo.pdfIn PDF document text
    • http://kgmda.com/upload/files/41131802776.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/vurugoraxekolodutagokugoz.pdfIn PDF document text
    • http://888chji.com/userfiles/files/xuniwinikedumexizomepe.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/xamagosadeziw.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/f3lhlpm83f3j9gj1dm9soog1gg/24267798544.pdfIn PDF document text
    • https://dentrangtrisaigon.net/images/uploads/files/talulibad.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/25870305401.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/25260318058.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210909145549.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/regolifiloseraxovatagot.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/zizulivanerevezaju.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613450f59fc38---tivebakajun.pdfIn PDF document text
    • http://julianina.de/upload/file/78607237055.pdfIn PDF document text
    • http://ketex.com/trcgp/ckfinder/userfiles/files/54539192220.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/35119289885.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_off0000c611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 18368 bytes
SHA-256: 9f5adb56ff87672367bebebb751ce828b30aee27b79cf7d613464111ef1fcc92
font_02_sfnt_off00010db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 10496 bytes
SHA-256: ad5d5971c90e2473933e879721a0fcd3b46457cb2c29020806879e5dd59fe8a7

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