Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eec07adbec4fde8…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 00:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bab225fc491d33851b849e3b4c10a47b SHA-1: e539bc9ad1cabb2575e3e1af4f01f1011338fe38 SHA-256: 6eec07adbec4fde8a28ed93241cc12576a29a7bc973304d9018f212ed2a6acf9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to disposable hosting, a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://jngf.cn/files/file/benuwobadoze.pdf In PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/ninub.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/66265475364.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/soxotagigoxewinakiw.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/votaromizot.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/742vg2o8brmvlbuumtgegcsvgn/zepawusojimax.pdfIn PDF document text
    • http://surestegc.org/documentos/file/28145080400.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136ee84685e3---43500787804.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/tudigamitivaxafogegamupo.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/29706428363.pdfIn PDF document text
    • http://travellerisland.com/files/53676205864.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/97471786631.pdfIn PDF document text
    • https://egc.ecrom.work/syo/files/jumodebomodat.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210905211349_lpone9.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/dagefelafonojenuf.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/kusutudulogexuzawunolot.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/jojabuzutewukibakutugebeb.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///kovolidezo.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161377c17af159---medonefobedugen.pdfIn PDF document text
    • http://maremania.net/img_pagine/file/64032778738.pdfIn PDF document text
    • https://tsolisp.com/files/file/xaxenajajudimoviro.pdfIn PDF document text
    • http://hbaoge.com/upload/files/20102677316.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/95817567285.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mini+militia+android+hackPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 17244 bytes
SHA-256: 98552f9beb1fb94aeb84405088028211d9e7c87599710e18defb2dfabf38e8a1
font_01_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 10420 bytes
SHA-256: 013ea5cd09fc5cd98bed84ccb328299dcdd55635b8f83666f5887441d8715d60
font_02_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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