Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacff3d26474116f…

MALICIOUS

PDF

97.5 KB Created: 2021-09-18 12:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 74191b679224aa96985712beaa0a9f26 SHA-1: fa6c6b84a9740e25990c6ebc9766bd4d76e50b03 SHA-256: cacff3d26474116f6f638dfe626650f37514330a6ec571baa3ab8b1475bdfa6a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=do+migraines+cause+dizziness PDF link annotation
    • http://paulgraphics.paulsfashion.in/files/69662287651.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/45161935257.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/pekazaxuzaxaxenuse.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/gizakobaforukenojazig.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/guzudigofuwoponutodanotim.pdfIn PDF document text
    • https://digicpictures.com/downloads/730335882.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/zozofukefon.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210913134421.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///66314246095.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/tinalowabomutafuwokubedak.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/99397452129.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/21606888517.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fowifajigoz.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/59487312969.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/12366497722.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/nujorozajebiraxotat.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614269b07bffa---30295008307.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/wimuwezasipinififutavom.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/luvilekegafaguvipiv.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/nedegiw.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/todelabesonoxaxa.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1ca7a6bf3cb4e74659f91dc1603258ea/6409320288.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/11488282474.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_off000117dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DC 10732 bytes
SHA-256: 3a4d3d73ecbae6698a03c8a784b871164b8715eeb58d9c0844a11a1cca368b7b
font_01_sfnt_off00013045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13045 18712 bytes
SHA-256: 23ca140b4c66971a65956350ce8aa03a8cde4a38205eade8e6d629ab14348ddb
font_02_sfnt_off0001609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1609D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1