Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a3dc296cb229eb3…

MALICIOUS

PDF

88.1 KB Created: 2021-03-20 02:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f22c3cc0e9fc1951d0cb1382f8217fc9 SHA-1: d5bcf0c11029ae705f44443dccdf65b91e9851ef SHA-256: 3a3dc296cb229eb359b586bac7577ebf2a7e3fb3e7f32b6ddab5d11afe74c05b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL and document body suggest a lure for a fake download, likely leading to the execution of a secondary payload. The presence of multiple unknown URLs further supports this phishing and download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=happy+room+2+free+download
    • http://serururepus.scienceontheweb.net/lelafo.pdf
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/fce8b2b.pdf
    • http://pifanaliriwabo.mygamesonline.org/niruputujasugebuvaluv.pdf
    • https://cdn.sqhk.co/jigugabopu/9cKibgc/wemel.pdf
    • http://nigemutekilum.mypressonline.com/sakovirotesopujavaxeju.pdf
    • https://cdn.sqhk.co/tuzijaxab/ifHxfpb/66440904534.pdf
    • https://gagezomelebagam.weebly.com/uploads/1/3/1/6/131606069/xawurivanu.pdf
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/7fadd33d.pdf
    • https://cdn.sqhk.co/kuruwoke/ahb6gWU/run_talking_ninja_run_mod_apk.pdf
    • https://cdn.sqhk.co/lomasamube/jeWLfNy/89863464088.pdf
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/e3bc549af2f8.pdf
    • https://cdn.sqhk.co/mumaxeje/gyqhabh/blackmail_odia_movie_video_songs_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_a1f53511340d4fe1ac2e711dbaa46e9d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7b5fd0e2-88dd-42ec-989a-d554fe1cc0a4/17229738194.pdf
    • https://uploads.strikinglycdn.com/files/fe46d280-1ca4-4f2a-861d-6ac4645ecf48/metric_system_scientific_notation_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/3c881138-ba05-4269-9646-61daf1e215cd/95527491167.pdf
    • http://nerivuvesu.epizy.com/12672957399.pdf
    • https://uploads.strikinglycdn.com/files/e7661579-e74a-4f45-881f-d101e086f1ef/86125740772.pdf
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_f5b32687789c45d795d9edc67567e2ae.pdf?index=true
    • http://farevuzafi.rf.gd/55486975816.pdf
    • http://mixomexazuvoxod.rf.gd/don_t_mine_at_night_sheet_music.pdf
    • http://katoxez.rf.gd/chrome_manager_auto_resume.pdf
    • https://uploads.strikinglycdn.com/files/ae5cab8e-98e9-4d28-82ac-c1236e5865a3/629318301.pdf
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_5341881f741344d9a199f5834aad6bdb.pdf?index=true
    • http://wekijedi.epizy.com/bus_routes_central_london.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
    • 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_off0000f8be.bin
7a4176ec9fef2c7de9ebdcf80d1a1e3f4fdd29ccb3a25a70aaf355dfaf7c0f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BE 5296 bytes
font_01_sfnt_off00010acc.bin
78a3e7621204fa5a0aea054695e4f313862f6347fa6c744ca74bc31ae22b3c6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 21136 bytes
font_02_sfnt_off00013be2.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE2 16144 bytes

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