Malicious PDF — malware analysis report

Static analysis result for SHA-256 315d5be257a6aa70…

MALICIOUS

PDF

86.3 KB Created: 2021-04-21 15:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c952b0a87ca6332a7058fc92827b3046 SHA-1: 9de2c384d1770cbcd686eb2aab0f87dad272e1b7 SHA-256: 315d5be257a6aa70ef91e067d036e974e1d6a065050a4270c51ea7413f85c18c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, appears to be a lure related to a sewing machine manual, likely intended to trick users into visiting the external URL. No scripts were extracted, but the presence of external links and the malicious verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/strik?utm_term=singer+simple+sewing+machine+3223+manual PDF link annotation
    • https://cdn.sqhk.co/nunemiziku/Zgegxgi/kabapedom.pdfIn PDF document text
    • http://reduslim-eu.site/xumosoludddtl6.pdfIn PDF document text
    • http://ladokewukuman.iblogger.org/bifilar_suspension.pdfIn PDF document text
    • http://furniture21.online/18671207967inu8.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/Ahhgjjb/24394857815.pdfIn PDF document text
    • http://yourbigdick.space/how_to_find_discriminant_of_a_functionlnhze.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafuzivega/gkibjgn/voice_recorder_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/GHagfYG/mc_server_connector_apk.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/babetafaperaxov/bank_clerk_exam_model_question_paper_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8f89c4-8f35-40c8-bbeb-98a9cdc6f901/2018_minn_kota_ultrex_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/msi_a78m-e35_v2_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/41865114233.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/gezajif.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/22632635119.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/tamil_new_album_songs_isaimini._com.pdfIn PDF document text
    • http://tunivepusage.epizy.com/batman_vs_superman_java_games.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/is_fios_remote_universal.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/dirty_riddles_with_funny_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258b3d1b-c853-49d2-8d26-5b9849d52a05/six_of_crows_kaz_and_inej_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f933c0a-bcde-4085-b3f4-dd25b7678ec9/in_cold_blood_reviews_new_york_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5003f4f6-5324-4dcb-ab68-efbcc24971d3/how_to_put_together_a_total_gym_elite.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/where_can_i_watch_blue_is_the_warmest_color_online_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54977c8-a2db-46e8-a9e2-3f9b3d1c2b4d/85450276645.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_off000111b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B6 5840 bytes
SHA-256: a78fef84b53ef92d454d2cc3b77306f37f0869c2ca9597fb00910279427954e4
font_01_sfnt_off0001257e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257E 10796 bytes
SHA-256: a42fa1259d662ed54c074f8babd5b2d762cda6862dee6226d1b6790151978be1

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