Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7041eee2fa452ab…

MALICIOUS

PDF

78.7 KB Created: 2021-05-13 08:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15131c4efa4084f78f593046ace73998 SHA-1: e268fba76c381debae773438cfb93a8bfe7f9b0c SHA-256: d7041eee2fa452abcdf174cb50103ada253911b11b424cb95982d329af10c4c8
136 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 pointing to a malicious domain. Heuristics indicate it's a phishing lure, potentially for a password-protected archive, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. The primary malicious URL identified is https://vilenefex.ru/strik?utm_term=nyssma+manual+2021+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/strik?utm_term=nyssma+manual+2021+pdf
    • https://cdn-cms.f-static.net/uploads/4415748/normal_600dffe890c32.pdf
    • http://gazajujana.mygamesonline.org/62229797435.pdf
    • https://static.s123-cdn-static.com/uploads/4528959/normal_600576268a541.pdf
    • http://womenalikumat.22web.org/graco_ready2grow_click_connect_double_stroller_compatible_car_seats.pdf
    • http://nebemor.mywebcommunity.org/voltage_regulator_project.pdf
    • http://jorowijedo.mywebcommunity.org/92571868461.pdf
    • http://jabudapitu.scienceontheweb.net/el_alfabeto_en_ingles.pdf
    • http://kozovuxe.22web.org/badri_kannada_movie_all_songs.pdf
    • https://static.s123-cdn-static.com/uploads/4500692/normal_5feb324a9b1d1.pdf
    • https://cdn-cms.f-static.net/uploads/4530578/normal_60412b5f91945.pdf
    • http://bimadepunepi.mypressonline.com/tutorial_adobe_photoshop_cs3_bahasa_indonesia.pdf
    • https://cdn-cms.f-static.net/uploads/4445750/normal_601f1e39ea892.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/620ce31b-f427-4601-8f8a-b5c10d7f626e/82013551991.pdf
    • https://uploads.strikinglycdn.com/files/a014dcb2-ec18-434f-8eec-e2ba5f38ece7/rajoraduwotavenolop.pdf
    • https://uploads.strikinglycdn.com/files/be23a3b5-6a43-4c4b-b2b3-ca3ccf147328/lg_lp1213gxr_replacement_parts.pdf
    • http://tuzuxutetug.atwebpages.com/85274421472.pdf
    • https://uploads.strikinglycdn.com/files/a9004bac-67ea-4e93-852f-1170f05dfbfc/how_to_draw_a_human_body_for_beginners.pdf
    • http://gidegefere.rf.gd/how_to_initiate_legal_proceedings_against_someone.pdf
    • http://bojepudadadax.atwebpages.com/after_marriage_romantic_urdu_novels_free_download.pdf
    • http://salegemivogo.epizy.com/malayalam_books_online_free_download.pdf
    • https://uploads.strikinglycdn.com/files/6bcc0dee-3630-4722-9963-75a19c9702db/ponimok.pdf
    • http://naxesabefadufu.atwebpages.com/soruxomofoparoxiboxoj.pdf
    • http://damewanobojojo.rf.gd/361514416.pdf
    • http://zutaturusix.myartsonline.com/12th_bio_botany_practical_manual_tamil_medium.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_off0000f715.bin
58f5ab1ec58fbc61981ba047fd2c37a05152dc82c408a6d6177f2b0902aa1b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 5488 bytes
font_01_sfnt_off000109c4.bin
f26ae7b99923b4a2ccc015e290a0642db9569b5beffc5fc3718ec197ce13bff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C4 10504 bytes

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