Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb625555fe45a627…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 21:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc8588445f3bc699ac2ed1256ffa7088 SHA-1: 13acacd391f3d542a4cb2bfe39b66bb4f8d7be09 SHA-256: bb625555fe45a627f5f03b25a958c7ef4c700e83ad268bd79cfa05efa3f6cf4c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to audio amplifiers, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=amplificador+de+audio+casero+5v
    • http://sazewipeti.iblogger.org/autumn_leaves_jazz_piano_sheet_music_free.pdf
    • https://cdn.sqhk.co/fagaxirupunu/9pcNnid/basketball_legends_2019_unblocked_games_66.pdf
    • http://tapabafana.22web.org/ros_cheat_anti_report_2018.pdf
    • https://cdn.sqhk.co/nozelenid/Hifhiie/live_sports_tv_streaming_hd.pdf
    • http://jerijoba.iblogger.org/78564410035.pdf
    • http://vidavubaxo.22web.org/erik_erikson_stages_of_psychosocial_development_slideshare.pdf
    • https://cdn.sqhk.co/vulovosovem/hbUgdhb/didi_food_delivery_app.pdf
    • https://cdn.sqhk.co/bedepekemat/NaGfjig/tuxodava.pdf
    • https://cdn.sqhk.co/daboxazile/gjehghb/pacdude_games_blockbusters.pdf
    • http://lupepujalin.iblogger.org/92752786236.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6233eabc-6fe1-4ad9-bad4-e08021abb4a0/3099714251.pdf
    • https://uploads.strikinglycdn.com/files/9d446117-3b73-4410-8c17-9ddc3284f0e5/66534602432.pdf
    • http://judoxezoxo.rf.gd/fall_of_reach_date.pdf
    • http://nedanitajaw.epizy.com/singer_model_4423_reviews.pdf
    • https://uploads.strikinglycdn.com/files/7b718ed8-b29e-4367-b8ae-b4153a8072fa/72043661978.pdf
    • https://uploads.strikinglycdn.com/files/928cc6f9-aa2c-4469-8bcd-9f1cad837647/bad_case_of_stripes_cause_and_effect.pdf
    • https://uploads.strikinglycdn.com/files/e27c73a1-4bfc-4b62-8937-9a18576044cd/21452789349.pdf
    • https://uploads.strikinglycdn.com/files/c92b0e4d-9658-4a0d-8c53-38f9f895c730/jutemopanuxoruvoxoveves.pdf
    • http://todonoto.epizy.com/supoxejavuke.pdf
    • https://uploads.strikinglycdn.com/files/cb3e625b-1242-4990-b559-45df0341c29d/jepoliw.pdf
    • https://uploads.strikinglycdn.com/files/89bf7a4d-92f9-4ae5-8833-54bb36f31569/books_on_fundamental_and_technical_analysis_of_stocks.pdf
    • https://uploads.strikinglycdn.com/files/44f5dcd4-b01c-4b54-9bd7-236bcc8ee4be/peguvumesuvusebijosovet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe4c.bin
f0be19978172d1d19b9767ccd64c74e6194ac26712139d05d534baf5242fb6c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 5472 bytes
font_01_sfnt_off000110e4.bin
042e19d455eaa165c30a3df7af077fa52a07d2bde36f3498556ec9fda8fbc34f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 12028 bytes

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