Malicious PDF — malware analysis report

Static analysis result for SHA-256 935d38b45b544abe…

MALICIOUS

PDF

85.5 KB Created: 2021-03-16 19:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9215cc694ac08430eab64e7cfd54b3c SHA-1: 7a571fd388db8dced6dc6294ac75b4f5bb2e76f5 SHA-256: 935d38b45b544abe0411323ec80ad70577644e6ba6202a79c410e3fe80e91d8d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. This URL, 'https://zajinet.ru/wix?keyword=grixis+control+standard+m21', is likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://zajinet.ru/wix?keyword=grixis+control+standard+m21
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/7107785.pdf
    • http://giwewigipebi.medianewsonline.com/is_grant_income_taxable_uk.pdf
    • https://wimatuzufuduwo.weebly.com/uploads/1/3/1/8/131871585/c2d68dec6bd.pdf
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5fcb57700fe77.pdf
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fdfa0d64def6.pdf
    • http://zavifuvalo.22web.org/wejabakufudabunizubazop.pdf
    • http://xubanapirobula.mypressonline.com/waxifunobuzodojosulitetig.pdf
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/pemafubif.pdf
    • https://lakupofudeb.weebly.com/uploads/1/3/0/7/130775354/6ff74a7e9c01.pdf
    • https://cdn.sqhk.co/kamupudoro/ijjgihM/coin_dozer_game_circus_online.pdf
    • http://dogalijun.scienceontheweb.net/zixowiziviwugiwodoviw.pdf
    • https://static.s123-cdn-static.com/uploads/4365553/normal_5fddffa449aa2.pdf
    • http://saporik.scienceontheweb.net/91611696503.pdf
    • https://cdn.sqhk.co/mifigatira/celF5kw/triblive_news_westmoreland.pdf
    • https://vavawuzozut.weebly.com/uploads/1/3/1/1/131163550/8984148.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1cbc7a44-64dc-4e0a-b39b-e297c71cc89a/luxedo.pdf
    • https://uploads.strikinglycdn.com/files/1795f1f2-fb06-47e8-b55f-373ae39d927f/britax_car_seat_fitting.pdf
    • https://uploads.strikinglycdn.com/files/55067042-1110-4457-b20f-4f82a43a735c/2000_suzuki_quadrunner_250_oil_change.pdf
    • http://dosidojabar.epizy.com/38594149069.pdf
    • https://uploads.strikinglycdn.com/files/84fbe14a-33d3-4fe2-a30a-7d33184f8519/12325743392.pdf
    • https://uploads.strikinglycdn.com/files/33423e3d-db20-41de-9002-ae156fe581ad/how_to_use_campark_t40_trail_camera.pdf
    • http://ruzofugeru.myartsonline.com/paxapudazizolumizad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f580.bin
7adf667c96a38de3a4a367a6a5b52b706ce25659ed1def96d640409b74e04676		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF580 7588 bytes
font_01_sfnt_off00010f4d.bin
ca97e95edd1185bc43a43fa5342b0613eaff98d8182d1e65d2506a626e37f960		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4D 5368 bytes
font_02_sfnt_off00012184.bin
a167f53aa50380aaf69a5a9344e848bc482168c48b9bd51dd8ef306e5de015af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12184 11400 bytes

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