Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9139f145084a25…

MALICIOUS

PDF

80.1 KB Created: 2021-03-22 12:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 17b091a92fdfe5f55093b56fa6353cd4 SHA-1: 411dbde451bcd4a2e9c18aff405b5a3282c2e097 SHA-256: 9f9139f145084a25681223272dbda55f72f3a6f37e4ffec3bcc3a2f00f241473
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to 'the ugly duckling play pdf' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=the+ugly+duckling+play+pdf PDF link annotation
    • http://digitaloffice24.ru/cuntos_pies_tiene_un_metro_cuadradokwktg.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/cjhjeby/33068585447.pdfIn PDF document text
    • http://qiwi-wallet.online/how_to_add_an_audio_file_to_wixo078b.pdfIn PDF document text
    • http://ergors.space/defixozo4l53p.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/tGTjjgf/nick_chubb_return_week.pdfIn PDF document text
    • https://cdn.sqhk.co/kisoxukapab/ejcHg1X/berokirejebidafidep.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/bJYjidU/traffic_rider_ios_hack_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/Kkkfiaz/zibufedopususekivef.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hcWRjf6/66769888076.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/YMbTjgS/symphony_air_cooler_diet_22i_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7d7945-988d-472a-9187-cb0452693fe7/ielts_academic_writing_task_1_sample_answers_band_8.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/baahubali_1_songs_naa_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde5592f-4e58-4b8d-a2e2-155d0dc9f65e/how_to_do_mla_in_text_citations_for_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/genobujujivaxuwezoravur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b5ccca-2a85-448d-b5da-80489af96561/how_often_does_a_2012_honda_civic_need_an_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/43044468349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85056f15-aaac-49ed-9e13-9fde361b6f61/veludulijumux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bfe99b-d41b-469f-9bae-1ffe2505d92b/41800844147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb701b2f-5063-43e0-b2a1-36aa0a119189/37514162975.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/how_to_convert_fructosamine_to_hba1c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a96fde21-34e5-4767-b33e-9421d87bd760/let_it_rain_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/aaa_abdominal_aortic_aneurysm_guidelines.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_off0000fa34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA34 5260 bytes
SHA-256: e695676b34b7d1df56b234d2b2b547df7828b273b335bb65b5e4ea22269e3e86
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 10936 bytes
SHA-256: 2732947bafc208cfdeb7e29b1a5de35aa2a53da47f70eb12888465cdf96d552a

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