Malicious PDF — malware analysis report

Static analysis result for SHA-256 624e84f3b94e2eda…

MALICIOUS

PDF

118.7 KB Created: 2021-07-22 15:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b79fce8b01065f375bd34c153eee7431 SHA-1: 1297fe5d3bb935d0e9c118bf9fb46256c1a3adcd SHA-256: 624e84f3b94e2eda731080b52b2ce5fee26d2df15602b2b7589a39d782135986
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and heuristics point towards a phishing or malware delivery mechanism, likely involving embedded scripts that could download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=perfume+movie+the+story+of+a+murderer
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee10c0df3d323292cd245b/1626214592804/73398779614.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f48be59c57c24939488f7e/1626639334023/stories_in_spanish_for_beginners.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f24704a047b6361219da8d/1626490628825/18696568308.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eda4e3834e745de9d13869/1626186980084/signs_of_bulimia_in_others.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8c7ebec70443d92383a38/1626916843361/let_me_introduce_myself_my_name.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec99389a1cf201f8068e3c/1626118456186/compare_relative_and_absolute_dating.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f7e3d938b1e25ea6e2478a/1626858458081/what_does_network_locked_sim_mean.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f48d5732548145d7979a4a/1626639703325/fekabedekejogipimaraf.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f4453150974615f92b2a8a/1626621233804/how_to_save_snapchats_without_notification.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f386c126e2e727c26454cc/1626572481668/jim_crow_laws_facts.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92c53f492d21a0f6b40f0/1625893971207/javascript_find_object_in_array_by_property_value.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e88129f3a1f037b370ebe1/1625850153647/laadla_film_mp3_song_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd9e734da7a51e3f264df/1626331623524/translate_english_into_greek_for_free.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f458d26c177f33d7aca284/1626626259579/4325693833.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3fd13699a8678c581834c/1626602772068/recovery_mode_on_macbook_air.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://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_off00016b03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B03 16792 bytes
font_01_sfnt_off00018315.bin
c9de4709e5dcf9d8ed1afca5d30b9be71eead6497b660e6bb4f64e943c9b22d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18315 19036 bytes
font_02_sfnt_off0001b3d4.bin
ee43310dd8d320369f85f8dec794a1ad983f2ed9636a113c0a804c9281fd6760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3D4 10748 bytes

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