Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaaddf6b6ce6d9b8…

MALICIOUS

PDF

85.0 KB Created: 2021-09-22 13:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e7bf53ca9a886fae2006a2a3e9d825a8 SHA-1: ffee3cc7675a8bd0175ed8431297f0457198195e SHA-256: aaaddf6b6ce6d9b86c2117aca2a04bf1c05267d8cbb91c65ee724d027d27b8dc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://queure.ru/uplcv?utm_term=garena+free+fire+new+beginning+mod PDF link annotation
    • https://kop-trans.pl/uploads/userfiles/files/bafuzirazosuzokubutenagul.pdfIn PDF document text
    • https://labelmarket.eu/data/file/10267971528.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/somijof.pdfIn PDF document text
    • http://zuche0551.com/upload/file/99143075725.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/16092802652.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210912202643.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/51200246543.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/warasedoforunefuwig.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/57646524292.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/720399927.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/manevusamanu.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eab48f3787---39430390488.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/12dada5e1548a757dca9c71d270c842e/75593431644.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/58346078912.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/14617816874.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/eb3la9crt8smr7fqnglk90crl7/zajapokikewuliw.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/serixuzunevojixumukovobev.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/31239410062.pdfIn PDF document text
    • http://safires.cz/ckfinder/userfiles/files/muwezep.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/16894565480.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/fukemeb.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/tiwikebusex.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/15935509131.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/tifamavixil.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/16814327990.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/25700137833.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/54588438443.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_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 18176 bytes
SHA-256: 80ed1f11ed9f97ff25b34b5d0014d171bab87ea34776acdaeaade05460bf7997
font_01_sfnt_off000115d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DED 10648 bytes
SHA-256: 768134f18dfb00bc5a06084500039cc074aa40659ad2511aaad990724262d30b