Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b6dc2f569f7972…

MALICIOUS

PDF

82.8 KB Created: 2021-03-23 11:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fbbeb893922a6a416be5d47d6843f7f8 SHA-1: aa69435966f324f696626dec9ec6cb57d6959164 SHA-256: b5b6dc2f569f797289ff1cf36f366bb0abbf0a309321350bcdecba5256d0aa30
156 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'esl speaking activities' but embeds a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may attempt to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://leonvi.ru/award?keyword=esl+speaking+activities+for+adults+intermediate+pdf PDF link annotation
    • http://jarevine.mywebcommunity.org/ez_go_golf_cart_street_legal_kits.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/how_to_load_a_bobbin_singer_stylist.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/victoria_secret_model_diet_and_workout_plan.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/charles_perrault_bluebeard.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/icNgfmY/personal_assistant_jobs.pdfIn PDF document text
    • http://vaxetopurorebi.iblogger.org/46509594879.pdfIn PDF document text
    • http://bobiruropiles.22web.org/wixabujomi.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/ways_to_boost_self_esteem.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/exercises_for_cerebral_palsy_child.pdfIn PDF document text
    • http://wazojox.iblogger.org/18872386220.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/hiRMgh2/24436633606.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pulavokaxe/5155409728.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/rational_exponents_practice_answers.pdfIn PDF document text
    • http://guseboses.atwebpages.com/bible_verses_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/blu_ray_tamil_movies_free_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/damaged_inventory_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/polexusomotetijupa.pdfIn PDF document text
    • http://xolekazejufu.rf.gd/btc_private_key_finder_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/carranza_book_of_periodontology_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/hedwig_s_theme_sheet_music_alto_sax.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/chronicle_of_a_death_foretold_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/721747663.pdfIn PDF document text
    • http://fifusudevop.rf.gd/zobugiguzumipifapokaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/25257228618.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_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 5436 bytes
SHA-256: 83439bfcfbe9db04b47ebb4660264074e1322fd4423a249abeff523a88eacf5f
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 10096 bytes
SHA-256: 356b9597f04191a01bcceb658230fb1ff6e7568e5507d31a5ecfb9b5cf0eedc9
font_02_sfnt_off00012ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.