Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbdc77e0423e6f4…

MALICIOUS

PDF

74.7 KB Created: 2021-09-13 18:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e3a46fc20716d8c1c9151a6740fbf009 SHA-1: ae1f353a6e2e61e3313e65484c5324b81a3ecd63 SHA-256: 0bbdc77e0423e6f412025d37b121781926755a9164be7553a7d1133126b20a5d
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 disposable domains and are structured as link farms. This behavior, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests the document is designed to redirect users to malicious content or facilitate the download of further malware. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://global-leasing-management.com/uf/file/32776378448.pdf In PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/61740561431.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324b672bd1e---wasajelonajomadawosifanas.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/vuvebipuno.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613a60be8cf7a---waxapujixafa.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/16415130393.pdfIn PDF document text
    • http://zerosquareonline.com/file/97292990014.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1630997254.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/zijifufujoxiwaw.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109132037156820.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210904_E85E44C2CCBB5155.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/memuzasoresar.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/63362533283.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/66660455987.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/94735200849.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/wanugeradojomukalajorob.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/nepefefupusote.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/32305699400.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/59688047328.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/xinozufuxowijubim.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/zivuzagugenawi.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/xijekinevaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pocket+god+apk+free+downloadPDF 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_off0000c0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DB 16900 bytes
SHA-256: fcc1545285ebc2edc522dcb42178eba446628012349f2636639ee05691095eaf
font_01_sfnt_off0000ec98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10712 bytes
SHA-256: ce0cec9104034a155d666963ea08b7a643ad26b70538f3a8a4d87a4e29d8dc43
font_02_sfnt_off0001053e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1