Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edfd59dbaed4657…

MALICIOUS

PDF

87.2 KB Created: 2021-03-24 03:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd6cdb07942e48ed9f708962060fe4b6 SHA-1: 3a0da027afe92caec63003ba3d928e57e5278a97 SHA-256: 9edfd59dbaed465739e7745886356048b7fc99fbbf306b8655f8dd8f42d1a848
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly and other free hosting services, forming a link farm for SEO manipulation. The primary URL suggests a lure for downloading software, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=dream+league+soccer+classic+download+apk
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/raxigo_fubuteluva_tudexesub.pdf
    • http://zubosoxi.22web.org/best_interior_design_schools_in_canada.pdf
    • http://electrumwallet.buzz/yahoo_mail_attachment_errorc5cnw.pdf
    • http://linudanozuno.iblogger.org/abbaigaru_pelli_movie_songs.pdf
    • https://melivuwupazadog.weebly.com/uploads/1/3/4/7/134721584/2950547.pdf
    • http://menesoger.iblogger.org/baby_shark_games.pdf
    • https://kajilavenusifo.weebly.com/uploads/1/3/2/6/132683330/9037666.pdf
    • https://dalideno.weebly.com/uploads/1/3/5/3/135384103/dfc5d54.pdf
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/b2df8ee4.pdf
    • https://ganepivojo.weebly.com/uploads/1/3/4/7/134774155/fewemitamixa.pdf
    • http://agencymedia-ig.com/tejusexefegefotasib61ou0.pdf
    • http://zeriwegitesokom.iblogger.org/zovilebogoxiwewuparax.pdf
    • https://tonukujile.weebly.com/uploads/1/3/1/8/131857071/pivulokige.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sizadagazagaj/labamakuxegukusazenobe.pdf
    • https://s3.amazonaws.com/tipikaxe/37057647354.pdf
    • https://s3.amazonaws.com/zuwosil/inventory_damage_report_template.pdf
    • https://s3.amazonaws.com/tedowafomaru/kulegimiwuvuva.pdf
    • http://poluwusafoge.epizy.com/runescape_ceremonial_sword_guide.pdf
    • http://zezatavaveb.epizy.com/novela_abzurdah.pdf
    • http://balubusepebibi.rf.gd/trello_product_roadmap_template.pdf
    • 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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000fbe7.bin
35630220399d8462c86ea2a9235ab4c6815c33a5e1340dd08481f54d5271d2c0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFBE7 16256 bytes
font_00_sfnt_off0000e90f.bin
c4774c04851c50ce8daac238bf80b4052352befc2f3d8ff26a2a544770dcb416		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5548 bytes
font_02_sfnt_off000128e3.bin
f24ef3a38c996e8b5ed9ae7cef953a6bb611b6a7697cd67275bbe091f56cf4cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128E3 11404 bytes

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