Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec62794613a25e6…

MALICIOUS

PDF

81.1 KB Created: 2021-08-19 19:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 412af8794e5b97a967111ba488e0995d SHA-1: 63d35169195e34160868b682052e74b0dffa55f2 SHA-256: fec62794613a25e682777a78bff2fd72a6e8aa71e3175f91735ad8077225e49c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading further payloads or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://ketchas.ru/uplcv?utm_term=descargar+super+smash+bros+64+espa%C3%B1ol+para+android+sin+emulador
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70336187e6---73534943241.pdf
    • http://aliglobshop.com/userfiles/file/letorapur.pdf
    • http://jentretiens.ch/uploadimage/xesavavilabewuf.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcfbda521---muvumipelofud.pdf
    • https://uetty.xyz/js/ckfinder/userfiles/files/33567563963.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40fb3c9653---rosudadomoti.pdf
    • http://desagresbrts.com/clients/34568/File/10039156225.pdf
    • http://vendsol.com/userfiles/file/tanirasote.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ggc2ocofthcjlbdomgfub5n66a/69787426075.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d43452833---nazozon.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5shm9h6o9326to7dgtnk75o39d/loteg.pdf
    • https://alutat.com/data/file/kogugopefukugo.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cecbf3ea5d---20282075801.pdf
    • http://edgecs.net/documents/defenamijofetu.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160fa675e06cef---fokokosoropepawekevenativ.pdf
    • https://mvpartners.be/images/uploadedimages/file/mimetatolozuk.pdf
    • http://beachhigh65.com/clients/879402/File/7736819980.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/0fda6a21cd8b27e6b23d7520ac921757/91150078689.pdf
    • http://allamericannursing.com/userfiles/file/31023802654.pdf
    • http://ed-web.cz/userfilesfile/17629657292.pdf
    • http://www.dawnrotaryclub.tw/UserFiles/files/najesofeki.pdf
    • http://agnieszkapawlik.com/userfiles/file/senitusad.pdf
    • https://annekienlen.fr/imagesfile/15805665971.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/fc692fff4aaaaa572b52a3d87b07b548/65262142852.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/1iuikm071nr1dcmbvkgiieu162/wizefagopamotike.pdf
    • http://15449010.com/FileData/ckfinder/files/20210715_BB74278DF08C86F8.pdf
    • http://etcad.net/np/upfile/file/32319340263.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d371.bin
a9cc2a40dba56e83d3566c9423219da987d223e520aec742cbfadc0225b4b44e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 17240 bytes
font_01_sfnt_off0000ff67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF67 16792 bytes
font_02_sfnt_off0001177e.bin
9a9213527a94520b45e99713279125dff506f55f95acd34758a0b8fc50b48ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 11556 bytes