Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eea1e58af58f948…

MALICIOUS

PDF

83.6 KB Created: 2021-09-13 06:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 75268acb816cb2b3fafb267372775fa4 SHA-1: 98bba0dad5971492ca71a779318e0edb62efe833 SHA-256: 9eea1e58af58f948c00526eb11ff0491b3024386b9e928ea6119071f8e111b7f
126 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to PDF files on disposable or suspicious domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further indicates a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305eb5f2ed3---64414706775.pdf In PDF document text
    • http://only-svet.ru/upload/files/45164654470.pdfIn PDF document text
    • https://deepex.hu/hirek/files/jewifaminirejuxixupip.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/92350215638.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/94578977000.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/21319014093.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/lamonir.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/bufunaf.pdfIn PDF document text
    • https://renewone.de/files/4497191639.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/pifevij.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/44247301973.pdfIn PDF document text
    • http://strahyi.ru/images/file/52582333025.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/romufedewafapida.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/68977306585.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/tajotipizonebafu.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/66393013577.pdfIn PDF document text
    • http://ciskmv.com/css/file/mumigotadinotizijebarero.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/povowetalosivozivejub.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/nadojutexaku.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/88728314877.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/8686682268.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/5646654714.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/98201594561.pdfIn PDF document text
    • http://hanstime.com/userData/board/file/pavupubuxibexuka.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/xonedokeluvibiboki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=fear+the+walking+dead+cuevana+2PDF 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_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 17396 bytes
SHA-256: 4cd47f31b2e9b7e09bd52240f07a0fb487e0c27b8c652a13551db857e8895cea
font_01_sfnt_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 10800 bytes
SHA-256: 1f2cc69e0c86d9cefaf7e76d012ea629601a93d31cf99086aec4ccc381d5a94f
font_02_sfnt_off000128d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1