Malicious PDF — malware analysis report

Static analysis result for SHA-256 24af716277aeb33f…

MALICIOUS

PDF

85.3 KB Created: 2021-09-12 17:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccd56e128cb6855306bb1c99eb7b7c27 SHA-1: 49ae583cc0ff78fee02bf624a597c9b6f171d8d4 SHA-256: 24af716277aeb33f98ef3f972488fe11c3f0342c373b88d5353927535dbc1069
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://gobelsprofil.com/upload/files/verapijuwesa.pdf
    • http://katour.ru/admin/ckfinder/userfiles/files/84997480377.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f872e2eee7---gimunibutadu.pdf
    • https://tiguan-wiki.ru/file/jatojonurugomavogoxu.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907190901226708.pdf
    • http://travelsi.ru/ckfinder/userfiles/files/podupomebibenufedegidexu.pdf
    • https://bikeid.net/ckfinder/userfiles/files/tutag.pdf
    • https://habibitoursegypt.com/ckfinder/userfiles/files/jadujokabiliguwitor.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/1e510df6cc68a63ae63b141131af875a/mibujinaveweruxuse.pdf
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/62969758868.pdf
    • http://krakow4you.pl/krakow/files/wogox.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f21b6940a5---18611431226.pdf
    • http://sarkar.ie/userfiles/file/44240582700.pdf
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/99670711497.pdf
    • http://ecogestval.com/userfiles/file/pidosuzokivakikep.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16136ea0957d79---54200848732.pdf
    • http://unibox.lv/files/text/gijemewepezuzeduzadi.pdf
    • http://adabaskimerkezi.com/upload/file/26515220414.pdf
    • https://dichvuketoanvn.org/uploads/files/50827746475.pdf
    • http://meta-min.com/files/mojevebefuxenawu.pdf
    • http://rudolphalexander.com/uploads/files/56343298305.pdf
    • http://nt-module.ru/ckfinder/userfiles/files/60350463562.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/besoparalaguwixi.pdf
    • http://akekaluck.com/ckfinder/userfiles/files/wigifojigawerijomefa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=swords+and+souls+hacked+unblocked
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fc.bin
a6d144da654b98522303fdbd8496b807534e3d1e51ffa7f0e56a0578423b7e19
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 10768 bytes
font_01_sfnt_off0000ffbe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 16792 bytes
font_02_sfnt_off000117d0.bin
36528b4fadf92d4b849afade72365b641e9e5e14f164b3fa45281a8b7bd3b01a
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D0 18292 bytes