Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed82bc5f420166e3…

MALICIOUS

PDF

82.7 KB Created: 2021-09-20 13:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1e04671fc6175f83259692f37c94dbad SHA-1: d7f5433399c33b7dabd7cddc436ea72b63fac7a2 SHA-256: ed82bc5f420166e30b64fcf717db4b1c033c0bf7db3961dc465909800bbb6bd0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/09257ef6652314a4c4ebc912b9abb27a/vukibijid.pdf In PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090908020173499.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/womavuxowotonitu.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/49781060182.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/98361164179.pdfIn PDF document text
    • https://slotpt2.com/contents/files/76178459848.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/71507231496.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/52139693500.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/xigoseteni.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/jedomitag.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/30375595912.pdfIn PDF document text
    • https://somogyplusz.hu/files/sokajasujerowaseropewiz.pdfIn PDF document text
    • https://tadimtursu.com/image/files/lifimoliwunapepokebafa.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/28124088793.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/vudud.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/zelatadexejinenaluxavis.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/10452100240.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/xevodu.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/memokalitobidonokife.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/laxafivofugodowugepexarag.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/lisumigesovotafasu.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/zarenaxemelujasawewazoli.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/65659274935.pdfIn PDF document text
    • https://htchninc.com/d/files/82513546693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=emulador+super+nintendo+romsPDF 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_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 10636 bytes
SHA-256: aab245d1aa891ef5a808e3a2537e1bf62c858f61cc94476e1fd9aa0da44fc219
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 20128 bytes
SHA-256: 29c553f5800c7cbdf53acf361c6663a500d1f4ae514ec88223bd227c903fe6e2
font_02_sfnt_off000124e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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