Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9121190bdc19c1d…

MALICIOUS

PDF

88.7 KB Created: 2021-09-15 23:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 76e05ffa1c92d38d58a1417dd708e629 SHA-1: 41e856a0049965643e8994afec04f50db4b162fd SHA-256: e9121190bdc19c1da6a0b8d2d202e6b33f360cd2f877e26afe7680f521a651df
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 embedded URLs pointing to external sites, suggesting a lure to phishing or malware download pages. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://beyondpins.com/calisma2/files/uploads/79635454644.pdf In PDF document text
    • http://vln.nl/files/file/79686501585.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/5589083753.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/68109324409.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/13580665311.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/xaviwotuxukezego.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/ruganebepilomavuwomewetig.pdfIn PDF document text
    • https://redengewinnt.com/userfiles/file/jedutojesir.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b19429f52---vuxaxo.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/61189336372.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/sukijumebu.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/resimolobikovu.pdfIn PDF document text
    • http://abwva.com/uploads/files/jinomovubixagaburom.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/mebuluxafe.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/77430583665.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/moremajowov.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7e374bdb5---nexejoxok.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/mebodotofukinuxikik.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/keduzujitajofajunaw.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/61033582782.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/garezuvis.pdfIn PDF document text
    • https://pqclass.kr/imgs/file/34155237670.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/4592796248.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/59636174686.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/suniberutawedilorosifa.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/zujeli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=rpg+android+gamePDF 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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 16904 bytes
SHA-256: 41d5e1888e1b9b7f539101524a9054609535f13413dbcaa91c237aef6768aff9
font_01_sfnt_off00012585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12585 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9C 10468 bytes
SHA-256: 32552083dcb3d9174a5026d6589d6ac887df4ee58adbdc42b253476e25e18015