Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70e889357c504cb…

MALICIOUS

PDF

91.3 KB Created: 2021-04-07 11:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db99c88b7afefc33e2997b9840ca5d95 SHA-1: a2ac95a3236c1047b472ffe21cbe28fb9cd61c71 SHA-256: d70e889357c504cb137d69a3a3c15191b3074f56ef8d88c1f8d3891fdd352680
104 Risk Score

Malware Insights

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

The PDF file contains a lure related to free grading templates for teachers, combined with a high ML score and ClamAV detection indicating malicious intent. The embedded URL points to a domain that is likely part of a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to trick users into downloading further malicious content.

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
  • 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://ponafet.ru/123?utm_term=free+grading+templates+for+teachers
    • https://cdn.sqhk.co/molivovuki/hfhbdgj/46897761778.pdf
    • https://cdn.sqhk.co/jotapepikota/bibAhgX/geven.pdf
    • http://vewikimeno.22web.org/japanese_english_bilingual_visual_dictionary_download.pdf
    • http://mubositesene.mypressonline.com/75578282252.pdf
    • http://nigemutekilum.mypressonline.com/dialectical_journal_template.pdf
    • http://suzupuwejal.mygamesonline.org/2005_chevy_malibu_tire_size.pdf
    • http://balonedud.iblogger.org/12392862076.pdf
    • http://kafalukuwemi.mygamesonline.org/audio_driver_free_download_for_windows_7_32_bit.pdf
    • https://cdn.sqhk.co/gikokimofegi/wIhcZhf/wusatudumov.pdf
    • http://worelimupuvefam.mywebcommunity.org/english_nursery_rhymes_lyrics.pdf
    • http://kivudutamazawan.22web.org/bone_density_test_age_guidelines.pdf
    • http://kakolamilasaru.medianewsonline.com/what_does_lll_mean_on_maverick_thermometer.pdf
    • http://sufulilutidake.mypressonline.com/xogenulutotor.pdf
    • https://cdn.sqhk.co/gilubibawi/ChiJdIq/perfect_kicking_season_nfl.pdf
    • https://cdn.sqhk.co/zurefaxenov/ifQmzSq/skulduggery_pleasant_quotes_and_their_page_numbers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xutenujute.myartsonline.com/fokalotunir.pdf
    • http://nejasixefunik.rf.gd/geographical_indications_act_1999.pdf
    • http://bifovigavij.myartsonline.com/newer_anti_tb_drugs.pdf
    • http://vipuzala.myartsonline.com/chlamydia_infection.pdf
    • http://lupixopuvir.onlinewebshop.net/77415663772.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_off000124ea.bin
ab774405ba8130e2772a89000f57e6d909d1f460fb187f46ec4e1877397f967d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124EA 5524 bytes
font_01_sfnt_off0001378d.bin
7e68105aa4e1a5cd81edcc45eec1a0fb8519ce56a5c9781c95348ad606375a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1378D 11800 bytes

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