Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92244d3465360f9…

MALICIOUS

PDF

70.7 KB Created: 2021-09-09 22:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f77db67759c9d343934739211eaf9f19 SHA-1: 52fa3f3b944135f33f8c04f06ef15074b65ce02c SHA-256: b92244d3465360f985eb0d7a531ef337af11824b4bbd26f73285c14fc6d56a5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters in some URLs suggests a phishing or SEO-based lure to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crysiq.ru/uplcv?utm_term=android+hentai+game+download PDF link annotation
    • http://papianiarch.it/userfiles/files/91147941730.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/18421319450.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/wuwuxuvulofakubifosovi.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/24500141978.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/mofanimepedejakazi.pdfIn PDF document text
    • http://efrex.cz/files/file/67022932474.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/3286912207.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/vazazukuzebama.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/11301330904.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/sinawujozulawotigajizu.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/nafuwunape.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161396808277c8---kovujegovamubobogojafiko.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/87946971089.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/kolilejamet.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/20417469284.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134915ae0f6b---17214119946.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/vapedosowopoginejapew.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/tidalaninoxobepenanevad.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/jugogeramevoson.pdfIn PDF document text
    • http://stromzeleny.cz/file/fopazoleje.pdfIn PDF document text
    • http://metapolar.hu/tmp/56519922374.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/xowuw.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/97828243181.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130b25ca2180---54384733369.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/lelavibe.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_off0000b786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB786 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9D 10596 bytes
SHA-256: 3e73c9e6f9433b051ac2fc492e34cbc46431b168d79386d67c07aa7520e2b191
font_02_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 14976 bytes
SHA-256: 1c178457e4bd479c40bf96b8c7f4ae5f5bd1e424bcd448bedcfbd1420518dab7

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