Malicious PDF — malware analysis report

Static analysis result for SHA-256 919a202c4e8fbbe8…

MALICIOUS

PDF

78.5 KB Created: 2021-09-24 11:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dc475030cc922cb962f60a24b0bd97a5 SHA-1: 9a5cdd495f34bd98b500c95e4dc33626293d93fd SHA-256: 919a202c4e8fbbe8ea8e25c41d4617def5146d5553ec1f047b07f410377a8193
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains instructions to disable security software, a common tactic in phishing and malware delivery. The numerous embedded URLs pointing to various domains suggest a link farm designed to redirect users to malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://huntic.ru/uplcv?utm_term=samurai+jack+game+download+for+android PDF link annotation
    • https://adurucui.com/ckfinder/files/7224622297.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/17887268380.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/gegotewegaku.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147ac6e2f290---27155685023.pdfIn PDF document text
    • https://costarica4d.com/contents/files/gujozemepapuzevoxofagij.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/limiginokiraxup.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/livoxo.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/nevex.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/zifelivevibajojomu.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/boxekunagorabe.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/87301772836.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161413fde6e060---17218039143.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144d5fe7c164---37566313067.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109162250273425.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/fixenuriwot.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/zivapelazajidiki.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/ginezozasedurob.pdfIn PDF document text
    • http://newmob.it/userfiles/files/57946309256.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/29878965865.pdfIn PDF document text
    • https://rotitelor.com/contents/files/wuwifejamelobefafogovi.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/vusenizudurupulot.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/zitagepodimigopurosojuzaj.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/73858589938.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/40302070495.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_off0000cbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 11036 bytes
SHA-256: 6b850678955c4f467d3d71a5827bca378092e3be68f8f752308f4c0bbbded12b
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 17892 bytes
SHA-256: 00bc5ad5436e3fa0ad91602e6b1e6a4d1f4b14eeb1e929329546f1a337d93fb8

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