Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1170e1ab2ddfa9…

MALICIOUS

PDF

69.7 KB Created: 2021-04-04 19:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9f728e4671c6b04e1c4aa4452429f268 SHA-1: c5f486e5e675700c82410c3e429274cb76f63f5d SHA-256: fa1170e1ab2ddfa98f30f52032e005ff1337988c0395a5f604a1ba03d46c0e3f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one pointing to 'soxebez.ru', suggesting a phishing or scam lure. The presence of embedded URLs and the overall structure indicate an attempt to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=berliner+platz+2+neu+intensivtrainer+pdf+download PDF link annotation
    • http://circleshtang.xyz/conclusion_for_acid_base_titration_lab_reportw2q8o.pdfIn PDF document text
    • http://hermidkovo.info/zentangle_art_ideasuhlkn.pdfIn PDF document text
    • http://espacecmb.xyz/2064184879qdhz3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403937/normal_600891fa9067c.pdfIn PDF document text
    • http://guwejino.iblogger.org/kinesics_and_context.pdfIn PDF document text
    • http://votamomitep.22web.org/vuzowonetotemijeralekinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_5fd892c9cd998.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/aritmatika_biner.pdfIn PDF document text
    • http://domainlimax.xyz/purapajurukunenikekanopiu00k3.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/7520247919.pdfIn PDF document text
    • http://smartcreditus.info/best_comfort_infrared_quartz_heaterhe1gi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/tf2_voice_lines.pdfIn PDF document text
    • http://likifodafiduno.epizy.com/runatijopej.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/55934324962.pdfIn PDF document text
    • http://risuveliki.rf.gd/definition_of_anthropology.pdfIn PDF document text
    • http://suwazepomigu.epizy.com/personal_branding_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/gujulefumokesegujo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/ayakashi_romance_reborn_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/the_ultimate_options_trading_strategy_guide_for_beginners.pdfIn PDF document text
    • http://tuxebawiwerusu.rf.gd/18775320981.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/13238463168.pdfIn PDF document text
    • http://visevagopar.onlinewebshop.net/lapijelokis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD235 5416 bytes
SHA-256: 936f3826c37d37dc91fa91f3b73d5e4fd7facdb852a36cb0914b9b4ec004bd7a
font_01_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 10960 bytes
SHA-256: 3b6e7c53dc52adcc6e7f803d400d17f9bbf29a38a8be6af7fd7e7328692bd20a

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