Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9467bd578fbefb1…

MALICIOUS

PDF

86.9 KB Created: 2021-09-13 07:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c5bcbf6a6903f973cec41c37c524113 SHA-1: 36edc98230739f71f02ab4933548433b769f4cf0 SHA-256: e9467bd578fbefb186d0bc9cabda22d7248b74c2e96e80594d2942fcfd91e610
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, a common tactic for phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to potentially harmful sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://victoryelectricalsupply.com/ckfinder/userfiles/files/motodejerodadaj.pdf In PDF document text
    • http://fbrasil.com/userfiles/file///36570876526.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/vexoxemej.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/71309894535.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/161370572bf0c5---86792830720.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/vafafiniludorutagejifivax.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/sevojetoj.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/18273114266139c053c79ef.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/zuvaxatidibevulovilokera.pdfIn PDF document text
    • https://ww150004.linebot.net/upfile/files/20210912192959.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/xapevik.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/11503045139.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/45701541675.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/pifofilive.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/ripuxokedulolalutimov.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613923791a758---bogobo.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210905114904.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/15071644419.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/xejukokeferu.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/kiwujofogujozo.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/10760917042.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/81685088636.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/82437921943.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/dafotet.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/41849557147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=parcelable+vs+serializable+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_off0000ee2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2A 10532 bytes
SHA-256: 1dd0ea7e94c6808beceb17c1040f4a9d61fa9ef0b9fc1f7196439eabf0c9c37b
font_01_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 17844 bytes
SHA-256: c24c512905b80b386495d5bf4650893d1e0ab1a7ff7c3bae73d18547a7ebaf1c
font_02_sfnt_off0001359a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1