Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be4fc868707d729…

MALICIOUS

PDF

91.8 KB Created: 2021-09-21 11:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d1bfd0c1c0c81d268db286fd133e9cb0 SHA-1: 6c1965d179d050d43d19067b3395c8f94b7445b1 SHA-256: 6be4fc868707d729a73de6165c32fc709689c98dbe4b40c2c7fbc1e923bd5e5c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous external URLs were embedded within the PDF, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting, a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://nomylo.ru/uplcv?utm_term=3+people+mahjong PDF link annotation
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/255435fa4393ece98e99fe344f53f193/19993252562.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/fimama.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/xumafowabadawodu.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/sunefajiserijuvi.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/wufunebosopizikejevatezeg.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/1746824819.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/bigewarer.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/62929517498.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/91922732765.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///zapef.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87206517307.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/xageka.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/waduvelemaluje.pdfIn PDF document text
    • http://ux-school.ru/files/files/butexupubazatupudamedoxim.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/fudemepuzazug.pdfIn PDF document text
    • http://clevio.biz/fckUpload/file/teligupoponoxelupipi.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/xoriluwekudew.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/73541618564.pdfIn PDF document text
    • http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/gumamoxup.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109160429214541.pdfIn PDF document text
    • http://eichler-kammerer.de/35773152520.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/26805211921.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///48513189084.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/dedewopuxewiwovewena.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/sejenizafafugu.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210912094631.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_off00010716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10716 16716 bytes
SHA-256: c68322cc1d981ae53171c94c0d7099b2ee236e7b3dd62e2678d5a627740fe582
font_01_sfnt_off000131e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 10444 bytes
SHA-256: 212b9eb188af0946b582022931a11e092a428bb47eb1f3572ce0019a762070e5
font_02_sfnt_off0001495c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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