Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c62f764c0386cc0…

MALICIOUS

PDF

79.8 KB Created: 2021-03-04 05:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e8b24df45dd86518476c1aba0f9892d0 SHA-1: 489c9e2e00afb75c1fb55435be94e2acfb4fa7ae SHA-256: 3c62f764c0386cc0e7bd462443501285ed7cc3d6caef5f6aac80959a8a296db5
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including one that mimics a search query for a product, suggesting a lure to a phishing or malware distribution site. The presence of embedded URLs and the PDF structure itself point towards an attempt to redirect the user to malicious content.

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://gimoguvi.ru/123?utm_term=haier+portable+washing+machine+not+spinning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468814/normal_602507e2147b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_5fe87a138a8c2.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/labutumagokidir.pdfIn PDF document text
    • https://cdn.sqhk.co/wofamofupu/a9EgdQ7/t_galleria_guam_shuttle_bus.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/dell_b2375dnf_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_601cc7f2af828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_60038d896ff0f.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/icBgiTB/anime_live_wallpaper_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/jOgehib/tap_tap_builder_online.pdfIn PDF document text
    • http://watogoda.mypressonline.com/amar_o_depender_walter_riso_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/A0igdtB/dream_island_acnh_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367625/normal_5fe1d73911988.pdfIn PDF document text
    • http://lemurezagamu.iblogger.org/arma_3_full_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455406/normal_5ff3093a6ecf8.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://fegegarovepib.epizy.com/xidatewiz.pdfIn PDF document text
    • http://bipofixijanafuf.rf.gd/xiwetakefuvakajusivono.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/mojetugenajolulegunuxozo.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_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 5328 bytes
SHA-256: dbdd7a37776433ae9820fcabeb6897ff662d7311f3946d865f716d2650ff93fb
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 10300 bytes
SHA-256: 4d73944b822417569336896126e31a1a21b907ffa18be6e7d071b04a2797b621
font_02_sfnt_off00012189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12189 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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