Malicious PDF — malware analysis report

Static analysis result for SHA-256 105ed2e350544153…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 22:56:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9a39bd77ac918c16f128dd21a447db5d SHA-1: 2c9af37ad5449ad2148c2608dd203684b97db284 SHA-256: 105ed2e350544153383e62d66e5276284fe38359aa7a0003405f36783d92b558
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to fitness, likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the high confidence malicious verdict indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=how+to+get+bigger+shoulders+and+chest+at+home PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425909/normal_5fdadfaa1f238.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/15409013384.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/how_to_use_black_and_decker_handy_steamer_plus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393370/normal_600360719729f.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/our_man_in_havana_audiobook_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_6006af14c9e60.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/darolilazavorajezipitojeb.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/arbys_salad_dressing_nutrition_facts.pdfIn PDF document text
    • http://katipef.medianewsonline.com/fisher_price_outdoor_swing_replacement_straps.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/lerezazo/autoscout24._ch_app_android.pdfIn PDF document text
    • http://wififeju.atwebpages.com/o_come_to_the_altar_lyrics_genius.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/template_complaint_letter_to_school.pdfIn PDF document text
    • http://kediditu.rf.gd/pi_to_pi_star_transition_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/27164273834.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/zabofesumoxif.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/sonic_all_stars_racing_transformed_apk_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/jarewegip.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/uc_browser_for_window_8._1_free.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_off0000e72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 5544 bytes
SHA-256: a5821666aa54ee08ae88eecd5458d003f352a9c14e960cbadadfd64cab19fd5f
font_01_sfnt_off0000f9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 9936 bytes
SHA-256: 7eedce8f337e0f7e28c8c2a52ee6824669c0e24ca28c026aad2259276abf4983

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