Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccfae2ea76cca2f…

MALICIOUS

PDF

73.0 KB Created: 2021-02-01 08:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dd141838ed15d2297801c95fb3b32ea6 SHA-1: 5d375cfe78e45e16caba1f35f6d8700adbfb1b9f SHA-256: 5ccfae2ea76cca2f37769646b1bf8e7ee9124f3fde93d490ee58a4a9252e8a34
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 0.9998

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://jacksth.ru/aws?utm_term=reported+speech+questions+exercises+multiple+choice PDF link annotation
    • http://clipshd.design/the_kite_runner_torrentiwysf.pdfIn PDF document text
    • http://rolevuses.iblogger.org/30799183607.pdfIn PDF document text
    • http://foruzakitotilut.iblogger.org/zidafokuvodafisar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fe8aadd7b5d7.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/soveridovidexumogirat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_6008fd4b4f841.pdfIn PDF document text
    • http://tersq.fun/38342320099pm4sj.pdfIn PDF document text
    • http://ig-copyrightnotice.com/vurulusobowuvzvybv.pdfIn PDF document text
    • http://bonuwefuganagus.22web.org/pasubufugenunetelajabujed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitovotiroxe.epizy.com/netpatch_firewall_mod_apk.pdfIn PDF document text
    • http://vonopexurobuma.epizy.com/guide_des_bonnes_pratiques_de_fabrication_pharmaceutique.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/deployment_plan_template.pdfIn PDF document text
    • http://nelodetasa.rf.gd/tatalaralarotux.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/abdullah_movie_ringtone.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/isotropic_and_anisotropic_minerals.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/maxorasi.pdfIn PDF document text
    • http://bajivuselome.epizy.com/aditya_369_movie_free_utorrent.pdfIn PDF document text
    • http://febarufowit.epizy.com/13236170465.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bmw_x1_2014_service_manual.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63B 5304 bytes
SHA-256: d648871d37bea3811c3969265751e1687f9cb0d09f090647d7cd43cb033c6622
font_01_sfnt_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 2032 bytes
SHA-256: 7cd63ea236a3a6d34ee5cfcf5f2ed40bd3c4c6d914ea15b4ac01f3e62163efdc
font_02_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10564 bytes
SHA-256: bd85d9f6ccc85307392235d18238c2dbef23cdacecf0c5ce72a2fbf98dbec6ef