Malicious PDF — malware analysis report

Static analysis result for SHA-256 d206c3f95b730960…

MALICIOUS

PDF

69.6 KB Created: 2021-09-29 03:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a213ab242529cfaadd0ab6f22836867 SHA-1: 35243b841a1fc4eb6fcc386bfe2058d3c0799bab SHA-256: d206c3f95b730960ee3ff7f9d7aaacbd84fe13282d824e4acb23f212d82d2778
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating malicious intent. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery mechanism. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or execute further malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ameshamagazine.com/js/upload/files/nuxonotemosuvokidapive.pdf In PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/lasobalelekazifu.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/dagusitawasifonu.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/gutunotepe.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/54206567122.pdfIn PDF document text
    • http://gamax-moto.cz/data/dokumenty/kugodutisirojakajotolusa.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/difan.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/9550060153.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/88760093901.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/56255281449.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130520c4882b---63415759803.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/ravevikovevodonagemimoz.pdfPDF link annotation
    • http://tuanlongland.com/upload/files/vazowafepiparu.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/bitisuguzowovazevepas.pdfIn PDF document text
    • http://advertisingreports.info/assets/ckfinder/core/connector/php/uploads/files/zosogimifovuz.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/88957379746.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/34424035401.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/99050489397.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210919092548_n8tgo6.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/63243954188.pdfIn PDF document text
    • http://anninhsieuthi.online/upload/files/84050744794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=discord+android+share+screenPDF 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_off0000ae88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE88 10324 bytes
SHA-256: a79a3ccf73026964cef3be6d0eac67e2ea4d43e86b42acb9db9c95161bd12ef1
font_01_sfnt_off0000c5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 17016 bytes
SHA-256: a4081c160dc8b286a031470580289213c06fb0b00b484e8ce3897ce7a679295c