Malicious PDF — malware analysis report

Static analysis result for SHA-256 314a342691775302…

MALICIOUS

PDF

91.7 KB Created: 2021-09-20 01:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38c14db2be92ea5dad99ba31fdc75706 SHA-1: 57d37840b44f3574a9af1857e164efc395273b9c SHA-256: 314a3426917753025c772f04a5a775a91e6d1c95da6a65e5cc047f86e035045e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one that appears to be a redirector with a search term, suggesting a lure to a malicious site. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of hosting many links on disposable domains, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://inwebjor.ru/uplcv?utm_term=naa+peru+surya+naa+illu+india+telugu+full+movie+download PDF link annotation
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134511493b41---pugipopagaziwewesu.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/17797820274.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/38897020184.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/3088146475.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/juxagozeraza.pdfIn PDF document text
    • https://agros.net/uploads/file/4878740442.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/buxoselebiduxonupilareka.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131543b476f9---89252474318.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/92306310207.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/rifolarulabawepu.pdfIn PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/jejilidef.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091214452083.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/35272648145.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/wogaxuladazedi.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/39722555005.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/65938205078.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/95897485380.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/lidigarimijup.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/33267276637.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jejetoxigepimifiv.pdfIn PDF document text
    • http://soc-in.com/data/media/files/24599951072.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///37744026701.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/roleladofukevuliga.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/jisujiseremowuri.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_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11522 18836 bytes
SHA-256: 587b408de1e6bd0d11cd8572f63108f59dc3d4d6bb3424743d9e416c8f970f3a
font_02_sfnt_off00014686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14686 11184 bytes
SHA-256: 2452e5dd6efc7ba1b10fef332012cc30e76ed2cc34864063efb0c9388ff168a3

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