Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1f66a7bb0a49bd…

MALICIOUS

PDF

77.8 KB Created: 2021-07-21 19:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a697b81bec7e03c46f3310e9d93b99e3 SHA-1: ab667ddad48cc1208cb8db6b586af4793acb1614 SHA-256: cb1f66a7bb0a49bd21836920fc6f046c4c8ec3f65c191e6edf7b388b061145a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://queure.ru/square?utm_term=1100+mb+to+gb
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc9ca2799685454f6d8da/1626196426335/8338517687.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9765f53e3457ef86493b/1626183525086/how_can_i_convert_multiple_jpg_files_to.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1eed70d6ba8380c563c4a/1626468055930/mickey_number_cake.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8815acdde05541e207d4f/1625850202477/bi_weekly_auto_loan_calculator_with_amortization_schedule.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e80bd8efb14d11221348a5/1625820120258/nuclear_deterrence_service_medal.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1d7fe7a061448cf8b4c4c/1626462206759/43332089070.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edf73ec6126f45c3e49f10/1626208062315/comment_in.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee95dd9b1e4d6a3611d59f/1626248669173/10077314412.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f242afd52b82025f9ece6d/1626489519289/lugobuvajobagusowokezesel.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f5250650974615f93799d4/1626678534247/fourier_series_and_its_applications.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edda3577fc8e778b56d5e9/1626200629754/electricalc_pro_user_manual.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8e0405183b3b579e0ed7/1626115588510/nypd_blue_upstairs_downstairs.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edeaa44485e42169031b10/1626204836632/vijorapezewegaf.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f442d29ee5897bffab4e51/1626620626641/lord_of_the_rings_return_of_the_king_game_pc_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f6ea1fc5a03e24066da8dd/1626794527525/99589125842.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f35a6a9c7c9f0ea99af8d4/1626561130520/32686800022.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f38ace668793736d34513b/1626573518238/ghost_in_the_shell_2017_full_movie_with_english_subtitles.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec853f2de985067773b2c6/1626113343730/q_of_spades_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee1f8ffb3cc800db533334/1626218383350/44704879839.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_off0000d34f.bin
7efe037340bf9f76c69d1590734f274c2b3bdedfb433f487d99d00804e92b847		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 16064 bytes
font_01_sfnt_off0000fceb.bin
7ad88a334b7df707ea9fe2f394139caea3e932921d75fbfd534610c4762f164e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 9864 bytes
font_02_sfnt_off00011299.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 16792 bytes

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