Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f946cbe1e221ee…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 22:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 736493437bb80cc1eae72fec44d471e1 SHA-1: 942057341fb690ba69c57e98f47523c1f7135614 SHA-256: d4f946cbe1e221eed18b7d008c25bc1320c678b8d3fd34c73717c4b3d9e93c55
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 0.9998

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://resalured.ru/wix?keyword=brawler+guide+aura+kingdom PDF link annotation
    • http://puvepum.getenjoyment.net/adhyatma_ramayanam_tamil_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/iaOjdQp/toss_the_buddy_throwing_game_mod_apk.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/annotate_tool.pdfIn PDF document text
    • http://megopoveguvujal.medianewsonline.com/microsoft_wireless_mouse_5000_spare_parts.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/78548985105.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/sujuwupivofaneralefo.pdfIn PDF document text
    • https://cdn.sqhk.co/remozemot/hb7mujd/xupisedovesijaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/gPBiijf/pbs_kids_games_daniel_tiger.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/32085794500.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/gejiz-motibapoxoganar-welizinumoxe.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/phet_interactive_simulations_isotopes_and_atomic_mass_worksheet_answers.pdfIn PDF document text
    • http://fegiroxopirez.sportsontheweb.net/vagebivumikotawili.pdfIn PDF document text
    • https://funesovikigaje.weebly.com/uploads/1/3/0/7/130740183/de718b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://puvapulugo.onlinewebshop.net/dominos_vegan_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/cursive_writing_practice_sheets_paragraphs.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/rodgers_and_hammersteins_cinderella_songs_1997.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/moonlight_sonata_classical_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/wasedalenamurogute.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/kider.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/vasoxepekexojibejaso.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 4976 bytes
SHA-256: f64151e85bcffcb26421ab13189b59ccba3191c12c2c627b3be8702f025c9f0f
font_01_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 12092 bytes
SHA-256: 35541b351bcb549cdf066bedeffc41ec50399a847ce6d2675a1d3d8587ce9b3e
font_02_sfnt_off00012343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12343 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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