Malicious PDF — malware analysis report

Static analysis result for SHA-256 70744d52395c38b8…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 07:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74f14a65b132154d42c10840b298eced SHA-1: 15d7d3b42376e15a1afc2c1d1efb83926999d8aa SHA-256: 70744d52395c38b8ca0e2f3f7c69057d77666252239cb503eeb2c23b29c68c10
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, impersonating cloud services to trick users into accessing external links. Embedded JavaScript and numerous external URIs suggest an attempt to redirect the user to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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 http://ressourcengarten.de/azubi/userfiles/files/panivuton.pdf In PDF document text
    • http://www.greddy.com/admin/common/ckfinder/userfiles/File/53798838859.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/gasawimepuro.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/silezasatowut.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/rorusakulotopitosadu.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/5776135553.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/90802918556.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/48396123080.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/matopinavoma.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/90810924227.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/lerofinumeturipufetafaze.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143facbbacde---15148558680.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/64718988889.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/82431691520.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/93635669482.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/xedudiwutuzo.pdfIn PDF document text
    • https://camphacement.vn/upload/files/92200384135.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/wutotikusumaxuderiduxodol.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/7087655094.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/10544946840.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/finolalazinajik.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/96492846129.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/nazarimulewapukutigeven.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/zapemiwinewazavupemoj.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/kimofew.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021091618473333.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/wurawugoruvovapefejizukel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ziggo+mail+instellen+android+tabletPDF 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_off0000e2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AD 10696 bytes
SHA-256: 464c3b8a2cc4e44b624a00aa6e8fb83838e6d16984fe34e80fc5baa9f2dfe8d1
font_01_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 17580 bytes
SHA-256: 1857e45b137a5f1c5ddbd0451e1b3d4c574c1eca7a3059058219d410c3e013e0
font_02_sfnt_off000128b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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