Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ad2e2a4582ce4d…

MALICIOUS

PDF

70.6 KB Created: 2021-09-21 00:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ee1477403a382cfb5c351ec8aafa87d5 SHA-1: f95f5b1a93917a9f5b72b65f12e3f34a5a1a190e SHA-256: 00ad2e2a4582ce4d443c0107d22ab84625806811886e71db52eb8f366a267335
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a link farm pointing to compromised websites, with one URL specifically hosted on a compromised WordPress upload directory. ML and ClamAV classifiers strongly indicate maliciousness, specifically flagging it as phishing or a trojan. While no scripts were directly extracted, the nature of the link farm and the ML detection suggest it's designed to redirect users to malicious content, potentially exploiting vulnerabilities or leading to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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.
  • 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://palezieux.com/ckfinder/userfiles/files/gigakijenema.pdf In PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137310fd38e8---74154197743.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/77491738889.pdfIn PDF document text
    • http://maymaygiaydachidang.com/upload/files/sefezaxewerotilutaxex.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/2988286651.pdfIn PDF document text
    • https://mar3ol.com/Files/files/xinapowegu.pdfIn PDF document text
    • http://xhzhengli.com/upload/32178463692.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/4280961817.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/49498107322.pdfIn PDF document text
    • https://bak.vn/upload/files/83442121599.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/vagedijolaludevisoguzodow.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/xefusipovokonokidoj.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/gazomazewaxexax.pdfIn PDF document text
    • http://hennel.hu/sources/elemek/file/lolerupaniz.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/78917612787.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/78426198313.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/jelulusolalokisokire.pdfIn PDF document text
    • http://quangcaosmsgiare.com/media/ftp/file/fipajoja.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/83dbc546ffc2e9a417a191e8e826910c/6366000774.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/81249153911.pdfIn PDF document text
    • http://zeci.nl/im/image/vurit.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/kekivinevizozo.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/59853998695.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613be9931ea8a---70601145015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+fire+red+alola+downloadPDF link annotation
    • 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_off0000b261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA73 16120 bytes
SHA-256: 557a03c6e374714107941dda32a3b89ec576df66cecad5f1deaffc77f6e2a569
font_02_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 10428 bytes
SHA-256: 8c1001c364ec67fed6fbc0f868e0aa41c15a28f031bbdafc93e5a9e1c5600053