Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad9f903d3c32c92…

MALICIOUS

PDF

96.0 KB Created: 2021-05-18 06:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5691e839897b03b5e3821afb0c33f18e SHA-1: 2f33d000c5e1ae91e39e327c1e6e8a50ee66155b SHA-256: 3ad9f903d3c32c92bc9c54822a09e8a69b6efe3274ae0bcb69155527c32d4b1d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL, 'https://seumenha.ru/strik?utm_term=how+to+get+unlimited+money+on+sims+freeplay+ipad', directly supports the phishing lure described in the document body, aiming to trick users into visiting a potentially harmful site. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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=how+to+get+unlimited+money+on+sims+freeplay+ipad
    • https://cdn-cms.f-static.net/uploads/4453579/normal_6047f2d227f94.pdf
    • https://cdn-cms.f-static.net/uploads/4369646/normal_602cf94941df4.pdf
    • https://cdn-cms.f-static.net/uploads/4485698/normal_60639e9d52cfe.pdf
    • https://cdn-cms.f-static.net/uploads/4424682/normal_6033ed0ebab44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remavuj/42550169521.pdf
    • https://s3.amazonaws.com/nefunupu/starry_night_mamamoo_mp4_free.pdf
    • https://uploads.strikinglycdn.com/files/320c973d-d889-4e99-82b7-38a882178c70/wicked_cool_shell_scripts_2nd_edition_download.pdf
    • https://s3.amazonaws.com/geradi/usb_flash_drive_spy_camera_instructions.pdf
    • https://uploads.strikinglycdn.com/files/cf6cd980-fe7f-44a9-8cd0-05ee56ddb1e7/sunbeam_brita_water_filter__chiller_wf6000.pdf
    • https://s3.amazonaws.com/vipinib/buderus_boiler_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/560bc306-e13c-46a1-9c6a-1eabdbad3ac8/58698293804.pdf
    • https://uploads.strikinglycdn.com/files/49d74222-88ee-40e6-af0e-e63dfcd2534d/value_education_notes_in_tamil.pdf
    • https://uploads.strikinglycdn.com/files/df36a90b-c3de-464b-ade9-4ac90570328e/rurolevasisix.pdf
    • https://uploads.strikinglycdn.com/files/4c92783a-0bbb-4566-b6fc-4ff7943dbe66/samemapatuxuzokevov.pdf
    • https://s3.amazonaws.com/jobavo/429115454.pdf
    • https://uploads.strikinglycdn.com/files/c54b8b85-b935-4409-85ae-1eed9739790f/filtrete_reset_button.pdf
    • https://uploads.strikinglycdn.com/files/e69c6e40-1216-4f86-9b00-2b0398d77726/blackberry_classic_2020_android.pdf
    • https://uploads.strikinglycdn.com/files/720e97c2-d86b-4649-aece-301234f71be2/adobe_suite_student_price_australia.pdf
    • https://uploads.strikinglycdn.com/files/e8812faa-11a6-4d5f-89fd-ebe5406673ba/warehouse_shift_manager_jobs_near_me.pdf
    • https://uploads.strikinglycdn.com/files/62a14cb7-4ce1-4cc7-a243-e7a94bc4b078/2nd_grade_writing_prompts_worksheets.pdf
    • https://s3.amazonaws.com/satulibaren/fly_swat_game_template.pdf
    • https://s3.amazonaws.com/gidibesuxi/jazokoludakagupesuma.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f50d.bin
52abd15c54cee026018a6639739022e493f2d81b90bda6ad70c31b5878c894eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF50D 7284 bytes
font_01_sfnt_off000107f8.bin
75cb8c1800c5ea1bfc994c3e5921a12a933a713b50efb5f2fb0f45c5df407202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 5516 bytes
font_02_sfnt_off00011abf.bin
6f61623836725b385d0156223cf063bb2012a957272cafacbeb5936051b4e63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 15632 bytes
font_03_sfnt_off0001468e.bin
8ab103851df1f1f0b95d3bdf25b2c3f412215e7c924651b868eccfc3c632c108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1468E 16964 bytes
font_04_sfnt_off00015eb1.bin
d85a63c0ce2db608e7948a8aa6796c37f2cce60fc3b02088bff1c68e7f9015d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EB1 6348 bytes

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