Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1c65ec8ca88aeb…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 15:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 409147885e9a680cc718494d9e7dcf24 SHA-1: 6ac889fb9c1c026992df183aa106e8da46fa5cb6 SHA-256: 2f1c65ec8ca88aeb69bbaa8328b8d2a31a844446e83200cd512e989a7986691e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically a remote support tool pretext. It contains an external URI pointing to a suspicious domain, likely intended to download a malicious payload or redirect the user. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://seumenha.ru/strik?utm_term=guitar+chords+chart+printable+pdf
    • http://fly-drive.online/878695704399v2n4.pdf
    • http://lnstagramverifiedsbadgeforms.com/stayin_alive_bass_tab0j0ct.pdf
    • http://amandeepsadyora.com/vasopemixaselisarovifwfr7r.pdf
    • http://gaxesujite.medianewsonline.com/biopsychology_john_pinel.pdf
    • http://ing-cliente.com/talking_as_fast_as_i_can_photospiqsw.pdf
    • http://ecosbor.net/friends_like_these_podcastbp6j0.pdf
    • http://kipeliri.22web.org/verbo_haber_conjugacion.pdf
    • http://bonapimum.iblogger.org/91161877241.pdf
    • http://niwapona.iblogger.org/teamviewer_13_ubuntu_18._04.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zitulogakapede.myartsonline.com/rilomefavizefudugitejum.pdf
    • https://uploads.strikinglycdn.com/files/8ea939b0-e1ef-478d-ac5f-272e5b07c255/how_to_set_google_maps_shortest_route.pdf
    • http://pefimubis.myartsonline.com/vidof.pdf
    • http://wasalesex.epizy.com/classified_ads_website_template_wordpress_free.pdf
    • http://xuxegukazo.rf.gd/18100070988.pdf
    • https://uploads.strikinglycdn.com/files/ee19cec1-f0c3-4fda-867d-27f99ed42b86/maxiwiposojevinerufixuzi.pdf
    • http://bawavejukedosuv.epizy.com/byju_s_apk_mod.pdf
    • http://tavawefojob.epizy.com/how_to_change_the_code_on_my_honeywell_alarm_system.pdf
    • http://sazasewugekupej.onlinewebshop.net/wafuwaroja.pdf
    • http://gipatoxusopupos.epizy.com/original_spider_man_comics.pdf
    • https://uploads.strikinglycdn.com/files/ea11bab1-c6f6-439b-914f-403e8bce1d03/shark_navigator_swivel_plus_vacuum_cleaner.pdf
    • http://jomupaz.myartsonline.com/genetic_disorders_worksheet.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_off0000f5ee.bin
73619d673d42eb3b9e575d570e41542f45cd36c0b8675e82d49369c34b9209be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 5416 bytes
font_01_sfnt_off0001084d.bin
820f155f5b84cdabd74a2ca84dce8d46035136cb7e4133e6513c0e5e4b8cdec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 10820 bytes

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