Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa17699a3840a65c…

MALICIOUS

PDF

71.0 KB Created: 2021-05-01 16:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f592ec27f06087ccbfbed9a604869cb5 SHA-1: eef88098b39b9c90df1009b0299631dddbb381ac SHA-256: fa17699a3840a65c1d6cf46a1e37ce554201391014cacc0141e1a8ac57788af5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://nipisod.ru/strik?utm_term=grade+5+science+textbook+alberta+pdf', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF format strongly suggest an attempt to trick users into downloading further malicious content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=grade+5+science+textbook+alberta+pdf
    • http://muxoman.mygamesonline.org/barron_s_gre_vocabulary_download.pdf
    • http://devubowoku.mypressonline.com/30210341910.pdf
    • https://cdn.sqhk.co/vixonafom/jfjcF9c/fulugasawilo.pdf
    • http://kutegexuwudaro.getenjoyment.net/12866400033.pdf
    • http://pedagodogiko.getenjoyment.net/manebija.pdf
    • https://cdn.sqhk.co/towevefizub/rRjjf9i/vubal.pdf
    • https://cdn.sqhk.co/vabalogu/bicheNF/fox_deportes_xfinity_channel_number.pdf
    • https://cdn.sqhk.co/jafetegupam/jGwUggf/74282504134.pdf
    • https://cdn.sqhk.co/rejoxapuzopa/cKPifpa/naxagosadurawagamonuk.pdf
    • http://kojijeku.mygamesonline.org/23859473507.pdf
    • http://mebovedu.getenjoyment.net/zifafigakijepo.pdf
    • https://cdn.sqhk.co/xonizarisu/hdAgihg/rumozukabinufogu.pdf
    • http://mupifojoxur.medianewsonline.com/flow_cytometry_basic_principles_and_applications.pdf
    • http://gejulavofanutar.mygamesonline.org/vocalise_rachmaninoff_cello.pdf
    • https://cdn.sqhk.co/sozaxejiv/eUhdhhN/nidiwatoxixukilekoze.pdf
    • http://paselon.getenjoyment.net/hemoglobin_concentration_test.pdf
    • https://cdn.sqhk.co/kufagilan/aagiRAL/telecharger_parchisi_star_online_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tobidogajetu.onlinewebshop.net/26835743440.pdf
    • http://vorisenunajix.myartsonline.com/57257617748.pdf
    • http://padegijogul.atwebpages.com/why_does_my_dyson_keep_flashing_blue.pdf
    • http://gupizamowakop.myartsonline.com/centrifugal_pump_design.pdf
    • http://bajupigirosinaf.atwebpages.com/faporajorovuvasomekapuli.pdf
    • http://kubomefewofumim.atwebpages.com/puwuzavigara.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d742.bin
3dbc61d5af5a78355a70b314e4b74770b165778c285123d48579bd4eef3d5aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 5576 bytes
font_01_sfnt_off0000ea52.bin
4fd124d0a1ab9524c7b47cb4751bd110a2589130eb93f868c381914f03cf0fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 10576 bytes

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