Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bccc2e25e029d3f…

MALICIOUS

PDF

84.5 KB Created: 2021-09-14 10:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 04c65f76de6a30333fcc92d79f74cb78 SHA-1: 7db6ef92057c9aea300075f1506b3fff0873a9fd SHA-256: 0bccc2e25e029d3f45abc5c3ab2515896ca5931e0c7d128058cf1ac0be5a692d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The file also includes numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://synerhu.ru/uplcv?utm_term=how+to+use+voice+commands+on+android+phone PDF link annotation
    • http://coumert.com/images/file/77956166913.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161395904ab570---bipapepugukumatiful.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/fukikoligizodewopemo.pdfIn PDF document text
    • http://donghobaoan.com/uploads/files/47169163299.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/07332792096df1b5228ebc75ed93971d/kovemetunabesoxebinusu.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161342af8dd8f5---finewikunez.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/motigakalajix.pdfIn PDF document text
    • http://webs123.com/userfiles/file/49715884034.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/7p23uhn83mcictopcodkgqd05u/rurojigorona.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/lerori.pdfIn PDF document text
    • https://mauspro.net/upload/files/jevitujewivibesogin.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/vawuga.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/93031994188.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/40225386571.pdfIn PDF document text
    • http://lobi.md/userfiles/file/tekorin.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/zevudolofilorir.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/neretufetafisarumu.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/82ojdcmem35vl389lupg7a7kbh/48361305786.pdfIn PDF document text
    • http://limoride.net/gallery/file/kajomofikozizazuvifo.pdfIn PDF document text
    • http://biosite.ru/images/news/file/53229057188.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16131727cb31ee---laleta.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/43698434017.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_off0000e4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 10976 bytes
SHA-256: bfa92434775a6330c80a3197c8e117282ed6de00a5d19763e1d5dd2ea3def8b0
font_01_sfnt_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 17620 bytes
SHA-256: 1dfeaf00c7353ffe93c3bf692f53bb5dd61098a0f6368306346eeae516157784

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