Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceaaaeba659c531…

MALICIOUS

PDF

70.5 KB Created: 2021-09-25 12:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f763b7f1e1f1e79541060cd82baa59fe SHA-1: f887ccb89656eca1eb0c634ada42c008923205ed SHA-256: aceaaaeba659c531d6e0fdf5f4a3a105fe23b1dca311ce3bd2fb90c2c4a60124
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or trojan delivery. The numerous external URIs point to a link farm designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://drafthe.ru/uplcv?utm_term=all+phone+operating+systems PDF link annotation
    • http://dallard.fr/ressource/site-image/files/ruruturunuzekakujari.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/67602742649.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/vofowebujiwil.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/gazus.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/lemowevodoganusuno.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/vugidijatepin.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/dedorepu.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/lovoro.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/70438376889.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/39763324460.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb159d9f4e---ferefoxuku.pdfIn PDF document text
    • https://trystsalonri.com/images/file/mofesutufe.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/37914497666.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/8438153131.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/fevilawenajidumoboziw.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/fusemujigosujipu.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/11481217178.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c7ab699244---72866210940.pdfIn PDF document text
    • http://sakem.org/userfiles/files/31330333386.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/pazidowesenevopimupapej.pdfIn PDF document text
    • http://only-svet.ru/upload/files/jubadi.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/wesaxavasub.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/dazitilojebipesibazezulip.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_off0000b396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB396 15840 bytes
SHA-256: 58b3a84e91955798bbcf8797f91b1c4106282760e441300e4952c5c0b81a3f26
font_01_sfnt_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 10792 bytes
SHA-256: 02c93bdf1bef6ca94e61a8c7c08c5fa7762d65ca89684e275b15051d07501c15
font_02_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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