Malicious PDF — malware analysis report

Static analysis result for SHA-256 357205fd4a90a1e7…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 16:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 74b23d0e382cdd9c170e9543435bd2dd SHA-1: b2e9cae918914a47994a2f9ddc7d54b3e728c709 SHA-256: 357205fd4a90a1e711880bca241d69897731703a7697d868ff21e9ae7bb487bd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous URLs, many hosted on compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=gta+lcs+apk+download+for+android PDF link annotation
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/rimigiwidujotewuj.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/barexepif.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/94551731173.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/4217e0560918815c7d3d39beda34cfdd/34502451889.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/94310621397.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/98900274568.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210905210803.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/65446809716.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/xexisesuzagidepesenek.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/070d7238df466dadfdd46d599ab47660/59200872771.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144487826cdc---xesogenojiwamizojowis.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c40d53679f786011545d45785650ddd8/53339100151.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/23529505078.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/velisowutaxenapo.pdfIn PDF document text
    • https://aokman-drive.com/d/files/lalugatirakumuwinixaxe.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7e415c141---28489217054.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e68fda0e6e---gopafivadaluzukijeru.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5o21qkvkbtdvq41b7vmufj606r/zunizudavufonilonupinitok.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/7973541785.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/959446454ea47117aff941cb6e0dc96c/21416817244.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/wufazo.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/mimizomavogazenigexesuzu.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16145e3f001132---lumujuxebifekine.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/milimizotibevidegofoxekej.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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 10696 bytes
SHA-256: 17dd3159763878de02394cc553595545d7b4ed03dbac29a31d11f7317cf21c42
font_02_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 18328 bytes
SHA-256: 83bf331ff3d76ede70f986993095c76b59bd812b405e5b07767eb97b2a737314