Malicious PDF — malware analysis report

Static analysis result for SHA-256 509caec3229d2745…

MALICIOUS

PDF

234.8 KB Created: 2021-06-25 19:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a19d4439e1dca77145c52bacc1baedab SHA-1: 2b6cab59b5db6606328043b33f2ec7ce6ecd4703 SHA-256: 509caec3229d27458d649adc09ee0727dbc99a6546f89e1d62724d4c6ee9d685
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an external URI pointing to a suspicious domain and multiple links to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext by indicating the presence of urgency language within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ariana+grande%27s+number+2020 PDF link annotation
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/39bfc8653c39acc2a2354992727cffc6/kefubexeroboxovozapani.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/xawobo.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/5ismtdd9r5o00mkov6jk5qo3k5/53005590666.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/9evhm4nfl4b6s5qc8htvhbbmks/79798891705.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bac2f3646---46731126243.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021619647423259.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609967152df7b---gatade.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b1dbdcf4---witejogajilu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6a64708e3---xikomemabufefabi.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/misetulibetonejusuniwibum.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a838ed80613---sitikusikanedetanevato.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/xufavolejezuluwemozoze.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/33568417510.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/somapowizutijoxatunij.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f285b2cfbfb4ca2d705f8119f291f886/jobabatixojodivomigilen.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8965767cb---nelogutewotamevaw.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ae0f2b92---najujobopotogiwap.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210619_525624A63FDAE807.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/bagovogutew.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86463e394c---11161470007.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3f148b179---31878874769.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000306f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F1 17084 bytes
SHA-256: 006f187d4c7902677b2856cc98a5c8f9c1d212a35cf6ad790bcac41b04031a3f
font_01_sfnt_off00031fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FEE 4340 bytes
SHA-256: 2ef351f2907fe0ed3ef336c826a50de6a3009461dc9c4b77b9fa3abecf815c98
font_02_sfnt_off00033091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33091 24436 bytes
SHA-256: 3a8b7384adf86e99b727fc83cb3b71d4dc5f0b2bf1999ce15aaca78769c6c9d0
font_03_sfnt_off00036b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36B75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0003838c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3838C 10824 bytes
SHA-256: 7d42863f0e55f361f2b3c6263645c3f914e3155b03232a42a33c6c6a1144d142

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