Malicious PDF — malware analysis report

Static analysis result for SHA-256 801abdd487216e09…

MALICIOUS

PDF

84.8 KB Created: 2021-09-20 13:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e9b401b4c307344a30bea1eac1ba7079 SHA-1: e5f9b6b2ca01390760e934fa14096e32952b7952 SHA-256: 801abdd487216e090c604a1643d00f0d628a2fe1b44b221d2cefde0935c31bac
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer, likely to redirect the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cabini.it/userfiles/files/nemipodamut.pdf In PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/40003351147.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/puminolovedawa.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210918_DBE23BBD78324DD0.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/9543278361.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9090a6d7c3e0f0ef789a3ce8f9165cad/30486503789.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/tututarenax.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109041124372096.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/sipefavitori.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/rofajuluniputa.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/bovomilameferixonatom.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/sagebasiwa.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/dekijigimigujadulibuk.pdfIn PDF document text
    • https://kildevangen.dk/files/sizimaregufamid.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/45370450767.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109081656159839.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/fesusotezutoxuzi.pdfIn PDF document text
    • http://posuni.com/userfiles/file/22977184755.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/18679873530.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/rawatuvipasifex.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/ee0431c1f208dc0e961f7e2e0cd4a927/bixodariziketaw.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/gaderafebutusage.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/pufimor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+rid+of+game+pop+ups+on+androidPDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/gabajigow.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_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 10972 bytes
SHA-256: 335bf988218d109a0aeb3254b52500174c21ee0059c1e0b2b6420991098505a8
font_01_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 17328 bytes
SHA-256: 17ef9be77333da469f889081e14df2c5636a92be2b5e5c8b9dc68041ec9aa1e1
font_02_sfnt_off00012d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1