Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3168630723470bc…

MALICIOUS

PDF

74.4 KB Created: 2021-04-07 00:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9959aa17ba400b60d47be7349da7083d SHA-1: 7d75e6352defea3d6ba7832ed0085a8ad51e1f04 SHA-256: e3168630723470bce8f50f2b33049ee08abf387e12c0f335b224c61168ae93c8
186 Risk Score

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/award?keyword=victime+bourreau+sauveur+pdf PDF link annotation
    • http://fakaluwu.scienceontheweb.net/80791214636.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/farufasax.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/zegugeja.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/kafefopiwimixetebifafat.pdfIn PDF document text
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/xakimibafuzome-ropajetise.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/3689927.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/definition_of_mobile_technology.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/vuxawuvenemujob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6b5d04-429e-4766-b585-850722ce9256/how_to_write_resume_summary_for_career_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4468ec-2535-4d9e-a44d-cc984c9e7cb5/impresora_hp_officejet_pro_x476dw_mfp_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e23b7874-0a59-4e1a-9e4d-8945ffda48cd/heaven_let_your_light_shine_down_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800bdc5c-d5ce-418d-860c-aaa40c587f03/fifty_shades_of_grey_cast_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51080040-1be8-4bd5-bc24-82be2872a016/do_calisthenics_build_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc51480-d3ab-4a2f-b411-e58f99c168f9/24725061409.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/5e_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/raksha_bandhan_song_video_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/nomivezelulowopuboli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9ac14c-be22-4fd9-b81c-720b9552a2ff/jabovupusokanuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b841d834-b95f-403a-887b-bab948218123/how_to_become_a_social_worker_assistant_in_uk.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_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 5436 bytes
SHA-256: 8fd62b017a34ee8ea8e6d3d4f02c519c30fca44cea08cb572fea47e26eae11ab
font_01_sfnt_off0000f3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 12488 bytes
SHA-256: 3e43a373626725560f04ee8b5d86b30cacb40d7e4affe8f29c87a4fdf3681b1c