Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f26c7b247668da…

MALICIOUS

PDF

70.9 KB Created: 2021-10-04 09:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9a431519e2df23c3bdb90793d0074299 SHA-1: a10bf2f2b79b729849016e1cc0be95f7b453e340 SHA-256: e4f26c7b247668da568a3a69f6ad23fe61df5621a7f42325858c9e21b9a787ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content. The embedded JavaScript likely facilitates the redirection or download of second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://philabc.ru/uplcv?utm_term=rave+tickets+2021 PDF link annotation
    • https://binarbaidtrading.com/public_html/userfiles/file/gorotegunafazokag.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/kowopitirabogi.pdfIn PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/sopobemabuzamovipizopud.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/92615915963.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4eabfd75b80da87ed98039bc349d3623/fixigaz.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/bopokekegabemili.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/bazadobifunonutisekupi.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/83276173406.pdfIn PDF document text
    • http://studiodelcorso.eu/userfiles/files/40305800550.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/xunexumo.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/42511333653.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/xenekepodexosuparepagar.pdfIn PDF document text
    • https://dichvuketoansg.com/luutru/files/dagagem.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/pewowibakuvosi.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/28410687652.pdfIn PDF document text
    • http://mariancozma.com/_user/file/98239569723.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/74f56c7e385a1d7cc5bea34fdac4f500/wekatafalaxikigijo.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/nebuxanakuzinevexuto.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/tijuwazagunubozujil.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/zawuniwez.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/jagazoxovafutu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d76dfcf18ab3e6809c4b320a6cacb895/liludewuxilelawor.pdfIn PDF document text
    • http://www.520amis.com/upload/files/xunelurujev.pdfIn PDF document text
    • http://cellfruits.com/ckfinder/userfiles/files/91380119138.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/52617369547.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/wunekagej.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_off0000b32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 10352 bytes
SHA-256: 14cabd052e1ad639fcf729c4fc11d948c247d93a62bda7f21be823607f9a890e
font_02_sfnt_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 16956 bytes
SHA-256: 638e3b611331cbd8e5913572238c25eb6310f0849f2b8418234cc37d098d5122

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