Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e119a6a3c746fb…

MALICIOUS

PDF

84.8 KB Created: 2021-07-10 13:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6bfbe9760666427303ea4afa1f1c360a SHA-1: 5d4f0aeda8e36c53bc611b5acbc9026056cf38f6 SHA-256: 32e119a6a3c746fb8443aa452db79a78fcd6700db9b7d95a2cbfc9f28590d3cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The document contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the heuristic 'SE_DOWNLOAD_BUTTON' indicate a lure to trick users into downloading files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=reading+comprehension+with+past+simple PDF link annotation
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/filuja.pdfIn PDF document text
    • https://ka-base.no/images_content/file/kopawadikiridebi.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d71d49852---fajidateginuzesoninesuwew.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/dnko7d4pih3sl6af5jkn2gne85/vewado.pdfIn PDF document text
    • http://didopack.com/files/21191534356.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c495e9d7db385c1c5c4d1746dda42330/74575409791.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/18241625405.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/28501634888.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/2815b1b13f8c704c4865bf8669354933/6592349556.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/79ea9eec63d3da15d560c32d39ee0a8d/7964637604.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089f7e159062---49993721643.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/xefineximovovu.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/vexijebezimevofowu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081478e34fdf---30358284872.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/vetisixufofawosavar.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/71377679778.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d0d586db---36232459771.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/83097422528.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/zuvidejilas.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/vilojepemawokijilojajewi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/9ef1e92b5664cc38147a60ed3884471b/gurizosetirogevelezaz.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/suruvinusu.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/47266776954.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_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 11092 bytes
SHA-256: 56db5f2ab751f186ea84e225d6736aa8fe7f62572c3737fa9fb96bf0010eab31
font_02_sfnt_off00011b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5B 16460 bytes
SHA-256: e22bbb11dff5984712c20adc5dff20f502d2b5e81bf5e93b191a5b112f22128f

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