Malicious PDF — malware analysis report

Static analysis result for SHA-256 c942d1ca0243029b…

MALICIOUS

PDF

83.9 KB Created: 2021-01-25 01:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7ce6c3fe67769bbaaf788fc6e4d4be33 SHA-1: c09d7d066b8586a382598dbcee55619b11c24d06 SHA-256: c942d1ca0243029ba95af6134d640b83fa9cf234d9a1afbc5c3ce1e8c4485aba
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links are likely intended to redirect users to phishing or malware distribution sites, leveraging the document's content as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=guilty%20gear%20bridget%20dustloop In PDF document text
    • https://ruzamugube.weebly.com/uploads/1/3/4/0/134040566/9a148c67bf7c8.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/9c27c31998b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_600a5658ec663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5feb7866aa08a.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/3106181.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/zexapolonav_lazuzirasuwun_nenen_bararaner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5fcf2dfb873df.pdfIn PDF document text
    • https://rizafosukozesal.weebly.com/uploads/1/3/5/3/135346652/8437919.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/karibesirunodel-zepixej-teleroxemu-mulota.pdfIn PDF document text
    • https://lanufirosonez.weebly.com/uploads/1/3/4/7/134704233/f31da79d9.pdfIn PDF document text
    • https://wudajelenap.weebly.com/uploads/1/3/4/4/134470879/xasudi-nanadisubewos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5ffc8485d4895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484359/normal_5fde2a056022e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tofizo/dream_theater_best_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/49111672405.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/wezozeta.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/background_gif_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/33815474763.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/eclipse_plugin_development_guide.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_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 5400 bytes
SHA-256: bfc172141b11bdaa56a70bd028fd327efecabbd9020e2de5c32c611dcd0bf04a
font_01_sfnt_off00011c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C56 11072 bytes
SHA-256: 899d9da909a1b6923f24e42eb5f603de352c73b95adba70322a777bd7595b05e

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