Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e45a9127cd83c9…

MALICIOUS

PDF

88.0 KB Created: 2021-09-24 01:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c064885da27d7da23c46bb1e2e829abf SHA-1: 2da38539457ef4ef6fa48b4e4832db3da8a69cba SHA-256: 69e45a9127cd83c98c4bdfdccda5cbcefb4af8c434a7cca6d35b92ddd047ff89
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristics indicate it's a link farm, with numerous distinct hosts and links pointing to PDF files. The embedded URLs, while some are confirmed benign, are part of a larger pattern of directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://yigang-lin.com/uploads/files/202109062043131124.pdf
    • https://zbmbudomont.pl/userfiles/file/zamimotatakukezatirupisi.pdf
    • https://vidaleve.ind.br/ckfinder/userfiles/files/74649600201.pdf
    • https://senfina.top/uploads/files/fixapoxoleja.pdf
    • http://smelawservice.com/file_media/file_image/file/54504233420.pdf
    • https://myclubowners.com/userfiles/files/sobanogoxokefu.pdf
    • https://alwillislifecenter.org/ckfinder/userfiles/files/35161131770.pdf
    • http://nemalipics.com/duxunize.pdf
    • https://exam11.menapoint.com/app/webroot/upload/files/xikebagolefonovupenesot.pdf
    • https://www.adom.biz.pl/ckfinder/userfiles/files/pikuvexenaxubiku.pdf
    • https://clubon.top/uploads/files/xubarexekazu.pdf
    • https://eminentland.com/admin/userfiles/files/xuzulixonaragad.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/35a96ffd1e895ea02faa54c78603477f/15028672703.pdf
    • https://mtydizayn.com/userfiles/file/75312798409.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146aa079b559---22445279656.pdf
    • http://thinhhoanggia.vn/Images_upload/files/riwesupanabinunaluzafan.pdf
    • http://tinhdauvietnam.vn/upload/files/35030395559.pdf
    • http://rockefellersgold.hu/editor_up/42865534930.pdf
    • http://kirche-treuen.de/UserFiles/File/govixukovum.pdf
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/21129848448.pdf
    • http://joltiy.ru/uploads/files/49772178950.pdf
    • https://stopserv.ru/files/file/sameribaboligabelurefad.pdf
    • http://ros-audit.com/i/up/file/neloxideseriwur.pdf
    • https://arbormaster.us/uploads/files/pokenofukix.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/zakadobaxexividinitakitub.pdf
    • http://tlumacz-lipno.pl/pdrzewiecki/files/80785129444.pdf
    • http://templeton.sk/userfiles/file/fasofe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=forever+dawn+pdf+free+download
    • 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_off0000ee29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 16792 bytes
font_01_sfnt_off0001063b.bin
c68306e4372fbb6c5cf7b52e79e0aed448da985f643357a096a8333084f22ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 20068 bytes
font_02_sfnt_off00013ab2.bin
4c4800fbad67a4767d534f10c0f6c4374989065ced8a5d4f312ab938dac9854c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB2 10264 bytes

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