Malicious PDF — malware analysis report

Static analysis result for SHA-256 300ed71da1632d85…

MALICIOUS

PDF

85.9 KB Created: 2021-09-22 19:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c5209308041ec0f1149867890652d3c8 SHA-1: 00c70a1cb9fe82e5b5c4113434640629ba3ebf2f SHA-256: 300ed71da1632d85b570956ce2ba2630219ed09290eee2e9da91c7c4b6cb7d6c
164 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 compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://cructi.ru/uplcv?utm_term=how+to+transfer+games+from+android+to+pc PDF link annotation
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/buretava.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140edf8bb796---23930255640.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/xexofitetokowubuz.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/91836735833.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/12914486206.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/jodivix.pdfIn PDF document text
    • https://kawanmto.info/contents/files/17744366552.pdfIn PDF document text
    • http://khamranghaiphong.com/upload/files/lozopevadikutefoxomomo.pdfIn PDF document text
    • http://camonetinternational.com/files/file/vitupijizowute.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/purisudonogorepivozafes.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613abee262719---37268442681.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/tevodujapevirubixinura.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/4641009585.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/30239804518.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0303f2c6118473478757a613f068002f/wekedutapoxisufaturoto.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/93986245511.pdfIn PDF document text
    • http://autodilygood.cz/files/file/xopid.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/sukiluvesuzibowekulav.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021090213464283.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/nuvofemig.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/76661723597.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/dawizesib.pdfIn PDF document text
    • http://coolscape.info/images/files/97726465143.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/xexexe.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_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 17460 bytes
SHA-256: ad81ba19d8a257cee95b026dfc658b9a21319a4ac07e9ea5c3dad3b58429ac2a
font_02_sfnt_off00013061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 10996 bytes
SHA-256: 618832d6207805b2d628ce9fd19f12885e7e7c780939547009cf082b7a80785a

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