Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2fec0e042c5573…

MALICIOUS

PDF

78.7 KB Created: 2021-03-25 03:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f31f53d08c5233836aa1084da4154d99 SHA-1: 585e1e6bc3e1f7cf65c10077507f010639ab0a7b SHA-256: 4e2fec0e042c55733f56500961f2b757f3659844d13296e51dfba98cb363f628
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=download+fnaf+world+update+2+mod+apk PDF link annotation
    • http://gifagudilul.mypressonline.com/what_are_the_four_types_of_textual_evidence.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/guhjgh3/movie_maker_for_windows_10_free_download.pdfIn PDF document text
    • http://bobipugoti.iblogger.org/ralire.pdfIn PDF document text
    • http://6gusevshop.website/windows_loader_2.2.2_rar_downloadqgipb.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/tratamiento_para_caries_dental.pdfIn PDF document text
    • http://golden-charm.ru/90270932465corfj.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/nuvekenetaf.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/kapifobetezo.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/didgjgh/color_chat_minecraft_plugin.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/IZjbje2/citytopia_mod_apk_2._8._5.pdfIn PDF document text
    • http://lopitimew.mygamesonline.org/a_great_big_world_say_something_piano.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/36779739430.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/35806582489.pdfIn PDF document text
    • http://munupesifak.22web.org/maths_lessons_for_grade_1.pdfIn PDF document text
    • http://gratoraama.space/261075365349cfs7.pdfIn PDF document text
    • http://karma-911.com/ninelaserokomamoji4p91i.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/ichbdPt/nipam.pdfIn PDF document text
    • http://turistik-a.ru/26094259429xpupq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botalibinizor.rf.gd/the_hidden_oracle_book_cover.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/85139912035.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/44932145831.pdfIn PDF document text
    • http://zalatikewal.atwebpages.com/19157882489.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/toyota_sienna_2006_oil_type.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/arduino_16x2_lcd_display_library.pdfIn PDF document text
    • http://duvodix.myartsonline.com/95710510560.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/39341424919.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/what_flavors_of_milkshakes_does_sonic_have.pdfIn PDF document text
    • http://tevomare.rf.gd/zesiv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 5296 bytes
SHA-256: 0b5d51af044a6a19b34d43ec91dbdacbe06281d909cd2b8cd8d657475aa1662e
font_01_sfnt_off00010544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 11788 bytes
SHA-256: 23e37924af8cb07bfe591a788f2fdfe2a852b990d1f3857ba22c132cbeaa39aa

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