Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4a710dd118a5e0…

MALICIOUS

PDF

82.0 KB Created: 2021-03-21 10:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 74f127077553f17bcec63e64d84f9941 SHA-1: 2d94a2b5a2b45099c025322694389ac549b46c0b SHA-256: 5f4a710dd118a5e0848605be98cd6c0e7a3b62d08066ede544b10d7e0c2ab71c
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure point towards an attempt to exploit user trust by appearing as a legitimate search result.

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://jumiwimov.ru/award?keyword=bruno+bettelheim+uses+of+enchantment+pdf PDF link annotation
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/6689369.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/d6oij2J/27392497325.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/WMjhckS/pinballz_austin_birthday.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/cKhgujd/gerekoged.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/hfDieje/paruserax.pdfIn PDF document text
    • https://dawerofe.weebly.com/uploads/1/3/4/3/134361643/jewuj-tofawod.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/i1igLtC/carrom_board_shops_open_near_me.pdfIn PDF document text
    • https://jepukarebav.weebly.com/uploads/1/3/5/3/135321711/fawoxelil.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/mRzjbgj/condado_beach_puerto_rico_map.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/cirque_du_freak_full_movie_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_bfa92848fcd7434e89fb0a425b7f8b1c.pdf?index=trueIn PDF document text
    • http://xobeminal.atwebpages.com/poveterekixodole.pdfIn PDF document text
    • http://bodalize.epizy.com/80277708020.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_41243ab310ae4863abbb215c634a3666.pdf?index=trueIn PDF document text
    • http://toloruware.rf.gd/91178143634.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_58e4aaf08c2b4ee4ace15336a2a43317.pdf?index=trueIn PDF document text
    • http://lelisavebak.rf.gd/plague_inc_premium_apk_no_mods.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_f65fdbf68e9e4316a77482fac3183902.pdf?index=trueIn PDF document text
    • http://jefevuxivux.epizy.com/vibujabematuxowe.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_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 5584 bytes
SHA-256: aec6ec4997a8b9ecc764c2750a8336caa143df1232545613cdd72b88a434e907
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 11072 bytes
SHA-256: ca0e651704492fe282f18c4dba050e0722c068f360e42b8d1d15c10a672f4472

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