Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0f2cfcc1d8cbb9…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 05:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a38cdf6469e99c576e04c695c1fe12c2 SHA-1: 74f12febafa25d73d1a4edfd05a10f2131cb553f SHA-256: 2e0f2cfcc1d8cbb9ff77c242ef6b7bc83a5ecdeb5fec17a3a54f4af129004299
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites, potentially for further exploitation or credential harvesting.

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://pistant.ru/uplcv?utm_term=greenworks+electric+snow+shovel+manual PDF link annotation
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/d64c76dc58cceeeede702eb13c51bbe2/50454221303.pdfIn PDF document text
    • https://anakmeong.com/contents//files/43336583357.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/luwodedowenejin.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/rewunofiripulamobidudoxuw.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/66597629260.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075064fd73dc---gubumoruvidifuwile.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/kurutawodipunakum.pdfIn PDF document text
    • http://chinalabware.net/d/files/fogilaj.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/zuvakijajerit.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a518d6a7608---31767691815.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wejuroposamafivu.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16293098451991.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/wiladajubunazi.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/werefok.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/xexolanomejibolagarunede.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/wokitow.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609a73bc0489a---30829061450.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/15201779f05140e65a849771b3fe0d59/zowidebamidubutifemeris.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/nagujalu.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/25339045445.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9272ecc6e---bigigisuvabegufixiw.pdfIn PDF document text
    • http://yilip.net/userData/board/file/famajun.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_off0000ce12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 17288 bytes
SHA-256: a52df7de435df5331219810f3e7ebf11ad14d3e2be70cd6b8f5f6387b195935c
font_02_sfnt_off000112c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 10876 bytes
SHA-256: 431e26178d83d8e1611ccc5a4256d05d395e2e61f5e974be482d78359d3963c1

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