Malicious PDF — malware analysis report

Static analysis result for SHA-256 8066dc2a10c84bed…

MALICIOUS

PDF

77.7 KB Created: 2021-09-14 07:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: faec5bfec50febdd8cb8864f60d40a84 SHA-1: 33b025ca1b8fd928ccad1252efcd9f777cc3910f SHA-256: 8066dc2a10c84bed1f336a5c6a2bdfac0c279d9f82962319a0372c273f053609
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The primary purpose appears to be directing users to potentially malicious external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/a5c3eb1e843c09caedaef8c45d646510/goxunaxotabomanuwe.pdf In PDF document text
    • https://kaptenhoki.net/contents/files/48556614625.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-7/20210907092404876875.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/romakovu.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/98183586693.pdfIn PDF document text
    • http://saktigroup.in/uploads/wozinixa.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/kaxonezobitokexajudu.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/41501103912.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/gupigudatoke.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/zodawibufevalabowonamoxug.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/99940896857.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/pakixemuvozapusepun.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/narubiletikuvororovakoji.pdfIn PDF document text
    • https://simorgh.it/uploads/file/dobukexovegeduweminorefo.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210902_FF2A16EFE2770F79.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/milulob.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/75394886117.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/3434215580.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/depaku.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/71650572780.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/61265410872.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/pepedesejoremiva.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/36244647086.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/dajawafuzezeke.pdfIn PDF document text
    • https://avflash.nl/upload/files/gobonidedovukusoso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=when+is+the+season+5+of+my+hero+academiaPDF 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_off0000c954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 18044 bytes
SHA-256: 085afa5af6b57b236dbf730950669726a390fafb0f930016dbefb69527146148
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 10936 bytes
SHA-256: 1dc7d9063e08b41f511c7a70f762371c636e8846e3ea5153531311672865da1e