Malicious PDF — malware analysis report

Static analysis result for SHA-256 953028402ed66061…

MALICIOUS

PDF

72.8 KB Created: 2021-09-17 05:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fba2d907df486785e85f509c35b23f63 SHA-1: 817cc6d231de9b9f46106cee11b3fbdc56485a14 SHA-256: 953028402ed6606103bc63fa2379e258466d47e3a0e8db18eab0a49ed183ec6d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/jekenexitisuromuzakarir.pdf In PDF document text
    • http://ltpbetel.ro/userfiles/file/55489542730.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/27960432511.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/jijibimosobol.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/rapoxuvudaxedurologasad.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/donaxisuwovavuviwad.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/fiwavezutediluf.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/welawupawolisusuroba.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/vezajejurowatugu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3bf97b9bb152ca81f99a9d6683da5b01/wijibawej.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/lezafunowaziwu.pdfIn PDF document text
    • http://vecsecity.info/editor_up/1760117901.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/faxirimulis.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/98887589158.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/83324852751.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/tewev.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/daxelexerudijivawokemopi.pdfIn PDF document text
    • http://neteyes.eu/editor_up/difunisuxageg.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/70301783143.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/88751032942.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161420191bf4af---kijivego.pdfIn PDF document text
    • https://mkserwis.pl/userfiles/file/93575890275.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613d40b86cf6b---46908914912.pdfIn PDF document text
    • http://placc.info/up_image/feranudutezuri.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/2380050521.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16143f7348c47f---xadepoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=vidmate+android+download+2020PDF 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_off0000bd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD81 15524 bytes
SHA-256: b64e10228aa18d83cd05abfb7e8e3f8388bcbf29c72fcad561312018e6a3906e
font_01_sfnt_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 10540 bytes
SHA-256: 94484ef9e471d57c302921bc06b9e0b5b20a34cb1b760e306db7659f0e92912b
font_02_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.