Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a52e059da95ddc…

MALICIOUS

PDF

85.8 KB Created: 2021-09-12 01:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 33e7e2e5be26b55862fa8a6e1e346cec SHA-1: ac0450a3e5197b85f5c6254af64d1aeb5da2d2d1 SHA-256: c0a52e059da95ddc5d193981174deb6440a9b41c55e11a6c8b4b5602c39b0f86
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shopinhome.com/ci/userfiles/files/48555552072.pdf In PDF document text
    • http://bkm-market.net/userfiles/file/79700739857.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210905053836191129ggkv8u.pdfIn PDF document text
    • https://renewone.de/files/57902932303.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/duxinazalut.pdfIn PDF document text
    • http://fittbikese.hu/files/file/tedowajumojexupi.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/94558259294.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/xolisutubezini.pdfIn PDF document text
    • http://efrex.cz/files/file/fowidof.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/xemufipupumudejanifek.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613929f19cf34---72886168496.pdfIn PDF document text
    • http://labotinnghia.com/img/files/23447248768.pdfIn PDF document text
    • http://parateam.cz/file/14346246051.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/nenazalijedomaludemiza.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/lebemetoku.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/vilitivibiv.pdfIn PDF document text
    • http://bangtaisay.com/uploads/userfiles/file/19431431065.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/datajejurovewomeko.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/fenoseba.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/65174817205.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/piput.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/47512694429.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/41157950656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=nouns+with+letter+dPDF 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_off0000ea16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 10344 bytes
SHA-256: 618a31a4ea9a54ced8c04a2ab8ee251bbe3ba2823795d2d42db6455205efc9f1
font_01_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 18844 bytes
SHA-256: ba0fc1c8a2e324e28ebb0f0976bf113e53cc52393990f09f8461c04e20905f03
font_02_sfnt_off0001320b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.