Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeb192a1b317703…

MALICIOUS

PDF

80.6 KB Created: 2021-04-05 13:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 128c56d1cd0cc28400b8912c40054ad5 SHA-1: 7dea3eadf3117505f45877d93311eb52a1d51d18 SHA-256: 2eeb192a1b317703af50986e94e0d3ca94a68006c5be42afeb4992831f6466de
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing malicious software by posing as a necessary browser update or extension. The embedded URL likely serves as the download source for the malicious payload.

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xezojetit.ru/123?utm_term=chrono++manager+crx+file
    • http://twirlini.com/37079716628sy2vm.pdf
    • https://cdn.sqhk.co/filemowa/ygihcib/13643815021.pdf
    • https://cdn.sqhk.co/gobajejuz/jgjjatc/zametawivegu.pdf
    • http://wirelessinfo.ru/the_feldman_method_audiobooksw40u.pdf
    • http://about-fb-support.com/72017548072mpdn4.pdf
    • http://aslixan.com/puwibureloribodevmlunz.pdf
    • http://sandwichhq.club/defending_jacob_bookdy3b1.pdf
    • https://cdn.sqhk.co/golemejexeno/PhbOnge/rfs_real_flight_simulator_pc_download_free.pdf
    • http://kimujedat.mygamesonline.org/cisco_ccna_voice_book.pdf
    • http://niburufajanuto.sportsontheweb.net/what_is_signature_valid_in_aadhar_card.pdf
    • https://cdn.sqhk.co/lopijikuvi/myzBgiL/puwatokixavov.pdf
    • http://lunagogafoxoj.sportsontheweb.net/xafefapu.pdf
    • http://sabuxaki.22web.org/asereje_las_ketchup_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bepolujogox.atwebpages.com/93708700591.pdf
    • https://uploads.strikinglycdn.com/files/9c456126-67a8-47ec-914e-03ed8b7ae4be/how_to_build_a_wordpress_blog_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/5274a88f-689d-40a4-86a5-e1b6a37d1353/60201056348.pdf
    • https://uploads.strikinglycdn.com/files/e83759a5-0895-48cf-87f5-ccd6ae61320a/96_jeep_cherokee_xj_mpg.pdf
    • http://mubinubamep.rf.gd/antimicrobial_stewardship_principles_and_practice.pdf
    • http://palelezugob.onlinewebshop.net/calibration_and_verification.pdf
    • https://uploads.strikinglycdn.com/files/2f78ce4b-04ad-4a6b-8da7-396a5b47a870/4428863391.pdf
    • http://kigagizotag.onlinewebshop.net/azorin_castilla.pdf
    • http://bipofixijanafuf.rf.gd/xiwetakefuvakajusivono.pdf
    • http://xaligapuk.epizy.com/zodubuwewujekunij.pdf
    • http://wesatume.atwebpages.com/52982716948.pdf
    • http://gebibem.epizy.com/cherry_bomb_le_gayi_song.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_off0000fcd7.bin
034557026edcf3c775a90af2a8093ab1cb24d3f2790ac15f37d6d1910f49a384		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 5092 bytes
font_01_sfnt_off00010e01.bin
158b4f404d68ae18c904edfbc6face7a4d2931b6450c300ba59f49393f4d8470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 11368 bytes

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