Malicious PDF — malware analysis report

Static analysis result for SHA-256 013a1f8fd9ca26fe…

MALICIOUS

PDF

74.4 KB Created: 2021-04-06 22:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0065325e4c2e001bc1ccf48f5a5f5ab8 SHA-1: 87aa7f42445d6ba06f1ab0cc1b5253384a981718 SHA-256: 013a1f8fd9ca26feba0ddc7538f6b00b88a082e9e5b9ab5066216081de548af6
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the link farm heuristic suggest a coordinated effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/wix?keyword=mouse+genetics+two+traits+gizmo+assessment+answers PDF link annotation
    • http://kudikadip.getenjoyment.net/shakespeare_sonnet_18_analysis_essay.pdfIn PDF document text
    • http://sehq.xyz/13696797698cfnid.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/icOajjM/eve_echoes_market_database.pdfIn PDF document text
    • http://itdiscounts.info/audio_driver_for_windows_7_32_bit_intel_pentium_4e4xy5.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/Oqje6gf/idle_merge_heroes_mod_apk.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/sewodotudunurefidale.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/why_my_acer_tablet_wont_turn_on.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/47127646585x87u7.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/f7Fjdjc/dokakivetupixafijekub.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/9igVSCV/50134341599.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/cgdggha/xoretalebijukufep.pdfIn PDF document text
    • http://youralteragoods.com/pituwitaziredoyl9l4.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/jijhhwX/77052603541.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/gfzFhf9/whatsapp_video_song_in_kannada.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/python_for_algorithmic_trading_download.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/qjj8u0i/candy_tom_petty.pdfIn PDF document text
    • http://afracheat2.xyz/nezupatixofekuwusuvarag66j9.pdfIn PDF document text
    • https://cdn.sqhk.co/xiponamoribo/ijg9ig0/tiempo_de_degradacion_de_plasticos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipanokule.onlinewebshop.net/how_to_cook_a_pork_roast_in_a_power_cooker.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/texas_instruments_ti_30xa_scientific_notation.pdfIn PDF document text
    • http://wepunulirepobi.myartsonline.com/rpf_ancillary_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/27775980945.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/28542063526.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/order_of_operations_worksheets_6th_grade.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_off0000e54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 5236 bytes
SHA-256: 35494c048d4a28829f941a0410296c2190283032e8d55e3dc79cf0f9fd27faea
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 10784 bytes
SHA-256: 96f2b81798427f81cfe838df8071357457ad971c7155ef75fec158a7816ba6f5

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