Malicious PDF — malware analysis report

Static analysis result for SHA-256 eceab3b9602eeaf9…

MALICIOUS

PDF

75.3 KB Created: 2021-09-14 05:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 671a11956ca754d2723123cf60bc92a7 SHA-1: 20886fb497d0b888ac05be89e894859b6f765044 SHA-256: eceab3b9602eeaf929679aea46ff038736b9a3f4fb0935533d4ee53fd22a42cb
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, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable domains. The ML classifier also strongly indicated maliciousness, with a score of 0.990806. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://inwebjor.ru/uplcv?utm_term=hack+apk+no+root PDF link annotation
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/wusipox.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/deloziluvesesogot.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fojowavefurimitem.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/9556638644.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/lunegim.pdfIn PDF document text
    • http://turnyras.lt/Files/file/82239171992.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b672966429---xavigurelezumep.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/83ab822e1fa0c4cb7199c3d728e11236/91269753864.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/7883421469.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376d4646fee---gumudepunowijiloz.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/8120e39a8e6d9568891aa511c9510946/64675022852.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/sopovezepowojezowasebej.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/63715998269.pdfIn PDF document text
    • https://bfull.ru/uploads/files/91353148082.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fazexowimegolatusitekuri.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zoxibinepunulit.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/wawepovipanajalevowolepe.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139b2a734c7a---kerazuwugejo.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/95902172832.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c42c0db39a---giginalofozo.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/94864433577.pdfIn PDF document text
    • https://novitas.ro/files/mudunosiwupupovolujo.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/matiripejomudidete.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/jejuvonolofifopizelovosuz.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/58457485035.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/63711630313.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_off0000c466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC466 17396 bytes
SHA-256: 9892f172ef7ddc7baea66909764c1fcd245937b16695f3942def07c842a3e6e2
font_01_sfnt_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 10012 bytes
SHA-256: f04669c25347545d18eccca212e7c196ba8093e2aaf0ba4156a203b2b7bbe5d1

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