Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2de39ed958bd53…

MALICIOUS

PDF

204.7 KB Created: 2021-03-18 22:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a005205a60239fad38ca5b3e653dadae SHA-1: 9da37b8fda13fa31cfaaad6fd59e294b52f8cf0c SHA-256: 9a2de39ed958bd5318905805fc9a9c95f70a65d75ae5dfd2f2ca2c5e3573f0fd
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL `https://crophysi.ru/123?utm_term=esquema+atos+administrativos+pdf` is the primary indicator of a phishing or malware distribution attempt, disguised as a document about administrative acts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=esquema+atos+administrativos+pdf In PDF document text
    • https://cdn.sqhk.co/wekaradukuve/jjIZghK/domowenunixivixeketob.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/mahabharata_full_story_in_english_free_download.pdfIn PDF document text
    • http://lozolupamo.mypressonline.com/nanoparticles_characterization_techniques.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/bkiio21/pressure_washer_pump_oil_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/gifMidz/renitasafunamewunenuresan.pdfIn PDF document text
    • http://vukogosapejofa.iblogger.org/what_does_reset_filter_mean_on_my_ge_microwave.pdfIn PDF document text
    • http://jemaluxelizadi.iblogger.org/helene_cixous_the_laugh_of_the_medusa_book.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/how_to_thread_a_singer_touch_and_sew_model_626.pdfIn PDF document text
    • http://rezexepenoma.scienceontheweb.net/how_do_you_reset_a_robertshaw_thermostat.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/aide_au_logement_2020.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/loxopudizus/rekoduwusiruwogevezixapig.pdfIn PDF document text
    • http://xuwabofori.epizy.com/97948683403.pdfIn PDF document text
    • http://lutaxipokujopej.epizy.com/58334301844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b89eed1-296d-40df-a260-23a9740fe827/how_many_chapters_does_jekyll_and_hyde_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab242527-739d-4c78-89a0-c12f83c86b6e/why_is_english_composition_important_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/cam_deformity_hip_x_ray.pdfIn PDF document text
    • http://bozomeza.rf.gd/careless_whisper_easy_piano_sheet_music.pdfIn PDF document text
    • http://zogaxemajov.epizy.com/combat_pistol_training_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714cdbb8-ae07-4f04-b884-7a4a3b5648de/kedalefifipizufuto.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/google_translate_for_computer.pdfIn PDF document text
    • http://nexoluximil.rf.gd/cantor_s_dilemma_free.pdfIn PDF document text
    • http://dakozel.epizy.com/hot_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e30340d7-69d6-4a8f-ab7c-346e5af419b7/nidexojakobomamekomipuna.pdfIn PDF document text
    • http://gujodupilewibo.epizy.com/82433533739.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_off00010ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECF 162344 bytes
SHA-256: eee9fb6f8b23b4e0ece7726d462b3636c4f5cb4dcb4bcd5a3fc981e1c097cbc3
font_01_sfnt_off0002ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA03 5296 bytes
SHA-256: 16e9404fb02a1590bf77495a4a2152bec0582a2e4542bde628139de499b7156b
font_02_sfnt_off0002fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF2 11224 bytes
SHA-256: 20fb01251f1a25efa9bd5c332cbfbff7eff34d9885a7841195903f678b09efe8

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