Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a4a19eed7a0288…

MALICIOUS

PDF

83.4 KB Created: 2021-05-14 06:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6074cb6d19feb08daa44fd75062aadc1 SHA-1: 5cfbb54c0dd60594b44dbd797a9c269bc21f78a7 SHA-256: 01a4a19eed7a0288957e347616f19f49385647d71d0c529d40fc12ca42501856
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to a book title, further supporting a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/strik?utm_term=where+does+by+the+shores+of+silver+lake+take+place
    • https://cdn.sqhk.co/lupobikud/whhcPih/go_kart_racing_on_249.pdf
    • http://lekezoreg.22web.org/canon_9000f_mark_ii_scanner_manual.pdf
    • https://cdn.sqhk.co/zolewiko/IMjjihP/api_documentation_template_docx.pdf
    • http://nizozipup.22web.org/knowing_god_s_will_for_your_life.pdf
    • https://cdn.sqhk.co/nozelenid/hhfgjxa/juicy_slice_tap_to_smash_mouth.pdf
    • http://wigomufeze.22web.org/abb_motor_3d_cad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ee79c17-6fe9-4a67-a298-4354410b46e2/how_to_get_my_eyeglasses_adjusted_for_free.pdf
    • https://uploads.strikinglycdn.com/files/c1d4390b-2b4b-4d89-a9d9-327dd91f0f19/suguz.pdf
    • https://uploads.strikinglycdn.com/files/3b70e2b5-c5b4-46b1-884b-5aed32054b32/xikojiniwepugek.pdf
    • https://s3.amazonaws.com/wobuzisibal/screen_wallpaper_free_hd.pdf
    • https://uploads.strikinglycdn.com/files/bbdca8dd-831a-4582-92f1-0020bed6b19b/75943480832.pdf
    • https://s3.amazonaws.com/bibejovixapis/26513301160.pdf
    • https://uploads.strikinglycdn.com/files/71600568-223c-44ea-b71e-70f7a57ae561/tipos_de_graficos_en_excel_y_su_funcion.pdf
    • https://uploads.strikinglycdn.com/files/7efcf4a0-cabf-4b57-bcbe-c321a252a110/how_to_wear_a_mask_video.pdf
    • https://uploads.strikinglycdn.com/files/10e12b45-9144-4db2-b975-43a2f11f5bc2/the_wave_function_for_a_particle_must_be_normalizable_in_a_given_region_because.pdf
    • https://uploads.strikinglycdn.com/files/350e01e7-55a7-4752-823a-6b2ad690e021/74107631325.pdf
    • https://s3.amazonaws.com/sumesawoxajew/viper_car_alarm_installation_video.pdf
    • http://wizunanaxenuxi.rf.gd/fazubelajatededamiw.pdf
    • https://s3.amazonaws.com/timeziso/problem_5-1a_part_2_2._compute_the_number_of_units_in_ending_inventory.pdf
    • http://mikobiduvug.rf.gd/29217045295.pdf
    • https://s3.amazonaws.com/jijari/cape_wrath_ultra_race_report.pdf
    • https://s3.amazonaws.com/rovuweraja/magellan_maestro_3100.pdf
    • https://s3.amazonaws.com/sukedil/cable_one_channel_guide_prescott_az.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_off00010326.bin
c62407d50ccff130a8e86c7d2a266ec9f7e0f5fe98b60d2a908c8631c13e2102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 5620 bytes
font_01_sfnt_off00011656.bin
f6facd9e0dc47c9fb18cce4b3f7b547d3b9e5c71ff36d24aa2a6ba2250139cb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11656 11812 bytes

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