Malicious PDF — malware analysis report

Static analysis result for SHA-256 248aacb0e4ac8181…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 02:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 40ba3186ae26d7a90c8cbd5126b91a6d SHA-1: c14ebe108c496ece9d95930992f1397464fab3ad SHA-256: 248aacb0e4ac81819797a66169a8425dbfc9fb4872a354cf47757af51987aab2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://poptheme.cn/uploadfile/files/20210902_072224.pdf In PDF document text
    • http://debeleven.net/UserFiles/File/mowabugemudekam.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/liwito.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210905_135042.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/wujifopo.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb1caed117---31003782878.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/wugadokan.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/8894301599.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/64846469894.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/viwaf.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1631106037mirorokiso.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/pedukaxemexefuzi.pdfIn PDF document text
    • http://ornito-silesia.eu/userfiles/file/92903851520.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/sutuzusawemowok.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/69545687784.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/92390144242.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/topifisewakavusi.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/tonajejijus.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/vilaj.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/pekefaz.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/rekisofurekofowilanex.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/xokozirobulo.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/pizelamujefi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613158d55f4b6---fovufa.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/sifemupevodek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+check+copy+paste+history+androidPDF 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_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 18752 bytes
SHA-256: 499dbe631b2a8dd6884d90fd2634db67ea2650eb9d06ec2ab8b242f548406c93
font_02_sfnt_off00011cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB0 10848 bytes
SHA-256: 3570d13d73621ddcd4cb8ef1c6957fc529af69417bbd4f64b84ac485f53ee06a

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