Malicious PDF — malware analysis report

Static analysis result for SHA-256 619c75283fba1c18…

MALICIOUS

PDF

98.6 KB Created: 2021-09-12 02:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: bd095ed96d5398f5be6522d900775323 SHA-1: efaac12e1e9f3f5e5c5e471e2f16ab89278deddc SHA-256: 619c75283fba1c184b5c6e79c842c20f76a2de2ccd0ff9f777e008a7c79dbcb5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://greatnice.club/updatefiles/file/maduluwuramokufosoto.pdf In PDF document text
    • http://redeyeldn.com/userfiles/file/womunabarajuboresujudib.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/9080630866.pdfIn PDF document text
    • http://atrsara.ir/resource/files/46910784418.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/givaniki.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1f13qm1e6k6ge06lvr9g7tffj1/2469575835.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/87822226051.pdfIn PDF document text
    • https://mimzyonline.com/userfiles/file/53666747296.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/roveti.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/zavugosekizabi.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/nefubepeburuboj.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/68017456945.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/9601059762.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/miwomavit.pdfIn PDF document text
    • http://sro52.ru/uploads/files/lezajewopatoxunosiwezov.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/minafolekawajanaliz.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/6734752253.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/jefupajafonakavemusag.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/gekemigugadabelebojonuxij.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/sk9olngr4dgjn4pj2ikfl6gdvs/wawese.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/foluvirevelogonumori.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/letifunugifadi.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/rogelupojalejulupiba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=watch+chal+mera+putt+2+full+movie+online+freePDF 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_off00011785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11785 20044 bytes
SHA-256: f9628ab037edff40a60232dee4b78e2d04f3c8811ab3fce8a40f51da83865106
font_01_sfnt_off00014b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16356 10856 bytes
SHA-256: b3c5bd1f3abb40b3424d2e47dd96fed102cf6099421faeeec4c5d3c3ddbb558b