Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6477fb147769414…

MALICIOUS

PDF

78.0 KB Created: 2021-06-04 05:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40aaaa19070528ccab57585e36974fa5 SHA-1: 50d8daf8feba5ed772627f986d7fa6aa4d647383 SHA-256: a6477fb1477694145a447beb4d1dccccff637c4c2f07c6fa750070a65ff3dda9
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nomylo.ru/pbw?utm_term=is+miraculous+ladybug+season+3+on+disney+plus
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ec662340-a671-49ed-9b75-ae87478a0136/33403413163.pdf
    • https://uploads.strikinglycdn.com/files/ab5c2996-9127-4f0e-9891-f3b52346561c/21396323397.pdf
    • http://ronakiko.pbworks.com/w/file/fetch/144551256/rufavojidogivadow.pdf
    • http://pulixojesu.pbworks.com/f/nisabijolukojuwe.pdf
    • http://mifimoruzuwo.pbworks.com/f/love_island_season_2_game_guide.pdf
    • http://fepewuwakow.pbworks.com/f/83019599564.pdf
    • https://uploads.strikinglycdn.com/files/7d32c789-21f2-4b5d-9c47-d792e4907528/54412936382.pdf
    • https://uploads.strikinglycdn.com/files/11d98ec0-23d3-4999-ae75-a2527eb3d993/york_gas_furnace_reviews_canada.pdf
    • https://uploads.strikinglycdn.com/files/f22e1334-9bd5-4952-9666-9761601c711f/when_was_the_last_day_of_school_in_2018.pdf
    • http://gajufabeke.pbworks.com/w/file/fetch/144423018/how_do_i_name_my_real_estate_business.pdf
    • https://uploads.strikinglycdn.com/files/0526f529-88ef-4132-aa59-019016dd57fc/how_to_connect_jbl_speaker_to_laptop_via_usb.pdf
    • https://uploads.strikinglycdn.com/files/21baa883-444a-4023-8b22-81b60b7c6fee/92689263254.pdf
    • https://uploads.strikinglycdn.com/files/3f83b21d-f7af-4d45-901c-86c2485b749f/85256946053.pdf
    • https://uploads.strikinglycdn.com/files/95d42118-cb14-4dfa-b0d0-b57d87477edf/mustang_owners_club_uk_cars_for_sale.pdf
    • http://giresizuloki.pbworks.com/w/file/fetch/144462978/13925120302.pdf
    • https://uploads.strikinglycdn.com/files/beae4a98-a637-4e6b-833b-81e906396eb5/34593463256.pdf
    • https://uploads.strikinglycdn.com/files/efe770aa-387d-4047-9d62-6b6dc2df77d7/93359990724.pdf
    • http://gajufabeke.pbworks.com/w/file/fetch/144574449/37097288455.pdf
    • http://mudowomuxexo.pbworks.com/f/gomevowowogenubej.pdf
    • https://uploads.strikinglycdn.com/files/11ffc010-62ae-4583-972f-8687f75ed250/castle_ravenloft_curse_of_strahd_map.pdf
    • https://uploads.strikinglycdn.com/files/823f69a2-efa9-4d3f-8283-a999fabc428e/samsung_xpress_m2835dw_imaging_unit_price.pdf
    • https://uploads.strikinglycdn.com/files/3c68a2da-a719-4362-bca6-efda49f74181/panasonic_inverter_microwave_genius_sensor_1250w.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_off0000f08c.bin
1dc94c645cb0ff06247fbb35239ef87e5e3d940235bb04280eb2546b45b798af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 5736 bytes
font_01_sfnt_off000103fe.bin
30e186468f389709357c443158484ca15f69e1e026a92afdf87100eaee066383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 11260 bytes

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