Malicious PDF — malware analysis report

Static analysis result for SHA-256 066e045e8409adee…

MALICIOUS

PDF

89.2 KB Created: 2021-09-13 04:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8808978428cf11aa27dff3ff71023ec9 SHA-1: 5197d3ab433cdc9824c75653b80befaddde672cf SHA-256: 066e045e8409adeeb0217df4e73b749570bb07b91371177fcbff353ccec2d0a6
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. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that this PDF is part of a scheme to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://angel-juicer.com/FileData/ckfinder/files/20210903_BAF3ED8AB9FD18F6.pdf In PDF document text
    • https://rivieresoceanie.com/userfiles/file/pijidinexeravopefase.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/54880785013.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/tudipepe.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/22882739924.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/82215841155.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/bugetepefi.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/tozorifosobo.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/dakopasinakomixekapovu.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/bawujolupixuluwutaki.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/tazipenoxa.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/5d2e1f150e9cc14333fa70f90e188c57/13747822363.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/tuvol.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/kuxelokekemegimadejude.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/wigarube.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a6dda90a7---51916422689.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/dilixoxedunewiwuged.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/jekofifadawujararusuja.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/manuma.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/54397025061.pdfIn PDF document text
    • http://cga82.com/admin/File/71127246825.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/gavutakuraf.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/51877176098.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/lakedukepuwojalilopudi.pdfIn PDF document text
    • https://cleartunemonitors.com/ckfinder/userfiles/files/11871030485.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/61685239101.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/46499188969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=aplikasi+edit+subtitle+pcPDF 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_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001115e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115E 17580 bytes
SHA-256: ea4710d807a44db8da664536884fb0a3013dec94b3f4751f14d07089282570f1
font_02_sfnt_off00013f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F41 10496 bytes
SHA-256: a05220a688e2212b02ff7e661f75c65ad4e9027099636ffd33218a6db7e08095