Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde78d8a53274f70…

MALICIOUS

PDF

84.0 KB Created: 2021-04-08 04:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d2dc2494db4250d99c5767cca3ee666e SHA-1: e953844bab6d92dec556512f5841a9ad42ea3783 SHA-256: fde78d8a53274f70a64e7e12a404ea23c70832c497055ba207dd5d27d27c0bc1
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/123?utm_term=adobe+reader+dc+latest+version PDF link annotation
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/e59a66.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvesanap/gdzgjgd/47387693587.pdfIn PDF document text
    • https://jaroxifapo.weebly.com/uploads/1/3/1/6/131636664/1ff980.pdfIn PDF document text
    • http://degifutuv.scienceontheweb.net/always_and_forever_lara_jean_espanol.pdfIn PDF document text
    • http://zexejodubaxiku.mygamesonline.org/fokumarudotetewubesaw.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/nizemuro.pdfIn PDF document text
    • https://cdn.sqhk.co/fujikapoji/WeiChgE/download_game_snowboarding_the_fourth_phase_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/Wjhjiic/tailbone_cracks_when_i_walk.pdfIn PDF document text
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/4609068.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/septic_encephalopathy.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/mGjclha/tadixaloseduxen.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/e0R3giu/12534500263.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/26004936474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radiviwix.onlinewebshop.net/botanical_name_of_plants_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/tugijebidifujemiku.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/automobile_engineering_ebook_free_download.pdfIn PDF document text
    • http://luzojora.atwebpages.com/toto_piston_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/danijixivexa.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/56026712993.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/puxuwidonesesotema.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AC 5124 bytes
SHA-256: e51e78ac6358b0619649e6c70a3c7932a58caee30f47eecb19dfd16378928620
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 2960 bytes
SHA-256: 7ee19a7b07d19e4f70b9b21f8d6537e988e76298ba3d8e7929ab418141d08e89
font_02_sfnt_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 10560 bytes
SHA-256: cd334ae27bf7e939b5a673a809e8446cd307f742d58c4e82dc517b00bfd0ea42
font_03_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 16708 bytes
SHA-256: df228c3c96336fe3e96a143a41a756edb33e77be65c7ba4a20972455521d2984

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