Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e515521487f2b4…

MALICIOUS

PDF

88.9 KB Created: 2021-03-30 09:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb484cd059f5ad25c57dba4d31011ffd SHA-1: 94b1b4ecd8862d078257b7d83791696f88434e32 SHA-256: 82e515521487f2b4461815642695352da18946c989fda9cccac310a9a5676d53
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'https://leonvi.ru/wix?keyword=osrs+f2p+pure+guide+2019' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful website. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=osrs+f2p+pure+guide+2019
    • http://kifudinufas.22web.org/garmin_gps_64st_user_guide.pdf
    • http://wipunemobak.mygamesonline.org/78084974976.pdf
    • http://jefevivavifax.scienceontheweb.net/pocket_icu_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6292a6f2-4fe8-496e-89e3-c5eacdd47706/how_do_you_structure_a_poem.pdf
    • https://uploads.strikinglycdn.com/files/78ac3c5d-1a4c-4188-923c-b742c082226d/waxabu.pdf
    • https://uploads.strikinglycdn.com/files/be2b3179-41d9-4cba-b9bb-522d67c5d356/my_toshiba_laptop_battery_is_plugged_in_but_not_charging.pdf
    • http://rurebirafana.epizy.com/13212188795.pdf
    • https://uploads.strikinglycdn.com/files/02122a12-3e68-4cc0-82c6-82a835c8dffc/34552010690.pdf
    • https://uploads.strikinglycdn.com/files/74eccd79-9620-4490-bdb9-1a6b36972bcb/how_much_2_cycle_oil_for_weedeater.pdf
    • http://gasigigi.rf.gd/92718193783.pdf
    • https://uploads.strikinglycdn.com/files/0304aa23-c1a3-449e-add0-34e8474e3a0a/how_to_reset_maytag_dishwasher_control_panel.pdf
    • https://uploads.strikinglycdn.com/files/d27bdf79-b3c9-4b20-a550-3ecd80941450/elite_rice_cooker_directions.pdf
    • https://uploads.strikinglycdn.com/files/89aadf36-d8cf-46bf-bafb-4da75944dfab/nasb_thinline_bible_large_print_genuine_leather_buffalo_blue.pdf
    • https://uploads.strikinglycdn.com/files/ab8b4b3e-6db8-45a2-a52b-2f7a5992ddef/16077466380.pdf
    • https://uploads.strikinglycdn.com/files/f7a33a85-6f71-42b1-967b-8c116e73479d/27574337612.pdf
    • https://uploads.strikinglycdn.com/files/5205baec-9fb7-4bb7-85d4-e871dd332a92/13196015459.pdf
    • https://uploads.strikinglycdn.com/files/fba84042-08c6-4d56-9579-94e9be7836d2/soundpeats_q30_not_turning_on.pdf
    • http://vorafudozef.rf.gd/nasagelinesuliv.pdf
    • https://uploads.strikinglycdn.com/files/b785df7d-591c-4942-bf7f-ed4f965dca07/woragejujobizulabibe.pdf
    • https://uploads.strikinglycdn.com/files/16e6954f-6ece-4125-a7a7-2772efcfe7e6/pizusaxuxobixezozelotuje.pdf
    • https://uploads.strikinglycdn.com/files/0fc9b341-9a30-4302-a842-93b736ac0bcc/how_much_does_a_sales_operations_manager_make.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_off00011e2c.bin
a0622cf69a031821ef2670a4a98384b76493cd83eb989375ecc7d990c4be57ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2C 5476 bytes
font_01_sfnt_off000130e7.bin
89439f01217234d3f5f651421c9017863a075e0767e607da270c6d92c89290cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130E7 11164 bytes

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