Malicious PDF — malware analysis report

Static analysis result for SHA-256 addc8b85b4caf4ea…

MALICIOUS

PDF

116.9 KB Created: 2021-05-02 00:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9a0bc3d7af6b4770fb359acf64d8a5 SHA-1: 3f0eda70f3251ed2479b1ff008c4e12020030824 SHA-256: addc8b85b4caf4ea89ceecc3682c0fe6488174c209116c74a8d61a30aa0b59b6
76 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains heuristics indicating an advance-fee scam lure. It directs the user to an external URL, likely to download a secondary payload or phish for credentials. No scripts were extracted, but the document structure and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://pelibifir.ru/strik?utm_term=best+stock+to+buy+2021
    • https://cdn-cms.f-static.net/uploads/4392656/normal_6020fa090de55.pdf
    • http://igcopyrightclient.com/sample_keto_breakfast_recipes95oqx.pdf
    • http://madewithsunshine.com/viran8tzfv.pdf
    • http://shoop-fg.ru/fekipilemudevafubinakezircwb.pdf
    • https://cdn.sqhk.co/fumazuri/zjcjhgd/offroad_pickup_truck_simulator_online.pdf
    • https://cdn-cms.f-static.net/uploads/4450250/normal_6023cf3ca91af.pdf
    • https://cdn.sqhk.co/woberimi/DghKib2/dictador_20_year_rum_review.pdf
    • http://rozel.ru/how_to_connect_vizio_soundbar_to_lg_smart_tv2dqsu.pdf
    • https://cdn.sqhk.co/xurakipigub/blcsicq/defeb.pdf
    • https://cdn.sqhk.co/mejofiwog/8mmii96/game_companion_watch_dogs_2_gameplay.pdf
    • https://cdn-cms.f-static.net/uploads/4368740/normal_605c89501d95a.pdf
    • https://cdn.sqhk.co/jepipovi/gjYhfjh/real_football_2012_old_version_download.pdf
    • http://keto-s1.com/munagimuwu701da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cde3bde7-b50c-4542-af44-0ca9dcfaf337/how_to_pair_bluetooth_headphones_with_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/53a936ba-1a62-447c-9e3e-5cbf9d070cab/how_to_enter_radio_code_honda_odyssey_2013.pdf
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_0cad0e11a7be452ebc81484cddbe3fea.pdf?index=true
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_1c7e8aa6de604285bb33ce19440ae62f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ca78a4a8-c971-48a3-9d4f-c249eefbfbaa/singer_esteem_2_sewing_machine_reviews.pdf
    • https://uploads.strikinglycdn.com/files/1788e24a-e293-4396-b434-b8964b8e02a6/how_to_connect_big_blue_audio_bluetooth.pdf
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_7508dfa7de1d4bf8838f7d151ec4e673.pdf?index=true
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_969699be17e548009ccbaeabc74dbfc1.pdf?index=true
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_b41dd85828cd429891006841a93d2424.pdf?index=true
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_4da42165c6214243aa759daf93fa08be.pdf?index=true
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_81e4e2fd04e34f0d91fb2121205027b8.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017640.bin
da46f42038ee6b7c6b15d8a2c656d9e6b375f9565907b805f42c65f832a0a6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17640 5136 bytes
font_01_sfnt_off000187f0.bin
476b88d8767653b664140028d769bfc8f3ea5ce35f9738d6040d640834877b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x187F0 12128 bytes
font_02_sfnt_off0001b11d.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B11D 16060 bytes

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