Malicious PDF — malware analysis report

Static analysis result for SHA-256 2097f62390f6e5ea…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 05:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f99c31a97d64867d81abdfcefa01ab64 SHA-1: 473f72039de2bbf9403e328b10731eeb7d6d7ff5 SHA-256: 2097f62390f6e5eaca3a96e5f85111ccf40f2507c10dad3d3afdb237050aa878
164 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and a large number of external links, many of which point to disposable hosting or compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to exploit vulnerabilities or redirect users to phishing or malware download sites. The embedded JavaScript is likely used to facilitate the exploitation or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cafeau1ait.xyz/js/ckfinder/userfiles/files/kofodibanowigeperoru.pdf In PDF document text
    • http://langeline.com/ckeditor/upload/files/soxinumakadul.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137e17199890---pobokujuga.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/12149448722.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/luwugudemenidugixonaner.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/23957352689.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/dufuzuroramuvem.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/lefedon.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/relaw.pdfIn PDF document text
    • http://tano-cable.com/d/files/24904534606.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210905152840.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/33179803281.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/ripixukuloriteme.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/50440106691.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/zarurenelufifel.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/73779068913.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/judosilaroninonisu.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb6ce4b07c---65786516302.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/rumuguzebevevo.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613807c1dd7ba---korejomewozokiwijut.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/56740226771.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/3074284287.pdfIn PDF document text
    • http://guowangcable.com/d/files/lozen.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/zafisak.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/13562545223.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/91192274776.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=watch+rupaul%27s+drag+race+season+13+episode+5+onlinePDF 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_off0000be4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD665 11280 bytes
SHA-256: 1a548a670afcbe33db8cb96cdb11c2a4874d36044b36132c81f7ebb916d6039f
font_02_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 17012 bytes
SHA-256: ba193165aa2ae32edfab4ce525148c3957ecee3d4ddbf959844b68dd78940544

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