Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b0d31a7605ac74…

MALICIOUS

PDF

79.1 KB Created: 2021-04-05 04:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a47b2e5ad653d1cfc7d0d1749f3877 SHA-1: 224461219c4d0c0fb0db98f026cc933ffe9d8480 SHA-256: c4b0d31a7605ac74f387cd6b231cabbc3a7bee4e5a8c7095c6d343322c768c03
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the PDF content suggest an attempt to trick the user into visiting a malicious site, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=how+to+clean+my+keurig+mini
    • https://cdn-cms.f-static.net/uploads/4377377/normal_6045eebb5d7da.pdf
    • https://cdn-cms.f-static.net/uploads/4390052/normal_605b0ea1f010a.pdf
    • http://wersita.fun/zagovolidolorasipoxed6h44.pdf
    • https://cdn.sqhk.co/nokotadi/dhhlUhT/vapogadujodudogir.pdf
    • https://cdn.sqhk.co/rejiwosujupa/6ifhhaC/real_car_parking_master_multiplayer_car_game.pdf
    • http://shopyou.online/buddha_boy_booksryt5.pdf
    • https://cdn-cms.f-static.net/uploads/4484990/normal_60144844d3c68.pdf
    • http://parkingtest.xyz/how_to_structure_a_pitch_deck029ie.pdf
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5ffd8341f26e6.pdf
    • https://cdn-cms.f-static.net/uploads/4379220/normal_602311d98f4ce.pdf
    • https://static.s123-cdn-static.com/uploads/4417308/normal_5fdcdfb4ea1dc.pdf
    • http://meine-gebuhrenfrei.com/how_much_does_a_32_inch_roku_tv_costllcum.pdf
    • http://lnstagramsupportinfo.com/cost_audit_report_format_after_gst6bjb9.pdf
    • https://cdn.sqhk.co/numavagoko/rWtC6jd/best_line_rider_track_download.pdf
    • http://instapriz.site/53389712890a5o3y.pdf
    • http://italysummer.space/life_fitness_lifecycle_gx_exercise_bike7w4l0.pdf
    • https://cdn-cms.f-static.net/uploads/4376120/normal_601139c880a5e.pdf
    • http://j3vnci4.xyz/how_to_grow_lettuce_outdoorslctvw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4455907d-557e-4288-a978-61929ee1a1b9/13268850167.pdf
    • https://uploads.strikinglycdn.com/files/26c8ec0c-9ceb-4592-ab67-a01306967660/34862211393.pdf
    • https://uploads.strikinglycdn.com/files/51aa3c09-b055-4cb2-bedb-d3d5f9e5e6c2/9832543296.pdf
    • https://uploads.strikinglycdn.com/files/6bddc5de-6b84-4cdc-ad1f-23d8a732b506/topuluruwepifad.pdf
    • https://uploads.strikinglycdn.com/files/bdaa45e8-ae67-4798-b9e4-f1ec526096ca/how_to_park_on_a_hill_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba5.bin
ebd2161b136c4b4b3b424a7ed7e082378071d27dd91aa4921097f908c92ec4c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 5044 bytes
font_01_sfnt_off0000fcc9.bin
0fc6d0ec95711608d8afe5286f1b338386473f7008fded07bad5f38a09950c96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 10532 bytes
font_02_sfnt_off000120c7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 4324 bytes

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