Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb1efe3f47b6de3…

MALICIOUS

PDF

71.4 KB Created: 2021-09-08 02:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 653577dacb1cfead678f22b6b552de1c SHA-1: f1b8aab7711608868c5c6277a42d70d25ef10602 SHA-256: 2eb1efe3f47b6de30777cb840ca684772f606cfb5d457ea94ac0bf528fcbea10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a malicious document lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://queure.ru/uplcv?utm_term=human+nutrition+pdf+notes PDF link annotation
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/0c5vnkphr3l66879f02go7tgsu/wasinuritotowonarav.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nfppj2luam1brbrucg78m9dqa6/natuzutesizedek.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/pataxexepifi.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2a7186f22f885bcd7d984c799d25f498/22605975567.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ade0a830d---xidelekuxegeretodineviti.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/mubogeromovisiremenudewes.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609224181bf57---fanatemes.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/20216161034238137.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/18312752944.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/wupateligilokebamemufizu.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/49449195310.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/matafutajigejulurad.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/93996547799.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/1623817135.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/wuwofawepupu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/2d9d03b2234066702feca80adf4cc5b7/35154489150.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/87046075186.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/de801c5476eab7cee7c79b9a1e32c601/42120453814.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/b11960c6dea019ac2f02f8a527704785/66894224283.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/66498126967.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cf22f953048---93582406723.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/tokojakopigumitido.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d7e1981469f1c295b87539138454212a/20787101075.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/64636913427.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_off0000b9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A1 10704 bytes
SHA-256: 31b0f381d328869dd73430813ee1808c5e2b04836715e5f595d6abe1f1c47ad9
font_01_sfnt_off0000d221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD221 15060 bytes
SHA-256: 8a388d92d28d1ef580ef3beb42eed9ab256a847690ec1d865a6ed89c98048002
font_02_sfnt_off0000f7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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