Malicious PDF — malware analysis report

Static analysis result for SHA-256 81108bb3c493c38c…

MALICIOUS

PDF

70.6 KB Created: 2021-09-25 05:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7ab0c26e27fae06b9b1ce6e6d7961313 SHA-1: 946c89e4b9eaba9a54d60ee373280e373328ba43 SHA-256: 81108bb3c493c38cf59e5c0d9024971632e5a699bfadd8a96f977e5232c64baa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://barahi.com/assets/userfiles/files/40126844982.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614665a33ab81---64581434710.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/jowawugugosivelikezixa.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/73765547723.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/zupebikoselegapidor.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/tixanowi.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/97717768093.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/22337173685.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/24828963164.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/weviluvosa.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/92908501813.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/ligesiferule.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/57057823168.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/zexetamuvamuraxijovoki.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/fojitoxesevaselusokitakur.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/15020d6e4bf057c6af6d54380bfd3e63/22233797137.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/18688931717.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/bupeno.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/tibowedi.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/23665715558.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/rewuxa.pdfIn PDF document text
    • https://panoramabyty.cz/content/86034483926.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/38260067267.pdfIn PDF document text
    • http://ptk-tent.ru/userfiles/file/39875536269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=slow+down+android+gamesPDF link annotation
    • 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_off0000af96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AD 10652 bytes
SHA-256: 4edb4798f7788d509aacbed9e998eb2ab6a977a9c29155a1e5afe0743a0889c3
font_02_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 18364 bytes
SHA-256: a6332cb491152faf2b1e3c7c4151bde8b87dfa5735eb21df70a7b53d938ff0a1

Open this report in the interactive analyzer, or submit your own file for analysis.