Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb102a599830b65…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 17:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4c760d279712efd8f010e39f26cbc1f9 SHA-1: 6ae47bf82736ac39222dc34cd8fdecc82756cb8e SHA-256: 8eb102a599830b655e5685879f63a3dedfa9092f25cbe94b2a7207a4b713db98
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites and disposable hosting. The primary goal appears to be directing users to external resources, likely to download further malicious payloads or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/87988631449.pdf In PDF document text
    • http://ppogrimall.com/upload/editor_image/file/nikijebez.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8534738257f0c7000ef86098ed4ed820/51830224662.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146eb8c8a75a---puwaruxego.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/zalepewenovebonuvigepiwe.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/16733553729.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/67334450573.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/85459592711.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/39247949955.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/nigajud.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/fikebanolofowamaxepaxa.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/mawewisiruxunu.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/74275862184.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/7724719158.pdfIn PDF document text
    • https://t-groupvnxkld.com/uploads/news_file/fogemipovede.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/28776517250.pdfIn PDF document text
    • http://devveb.net/userfiles/file/lagowesukesawibadonod.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b68c536685---zufetoraz.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/55736244801.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/84742676391.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/sojowerixitazujenireniv.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/wuvaromegowamobewugiwifu.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/72230916849.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/puvot.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/58067503556.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=noob+army+tycoonPDF 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_off0000b3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD6 15420 bytes
SHA-256: 10b07c3eca8eb6429562d53b021cee9748d0280aa18eb8913b8b75575cb6395b
font_02_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 10184 bytes
SHA-256: 88b53332757cf1017f836cb93e83c6babd876f2938c954b4cc30f7c893cbf7dc

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