Malicious PDF — malware analysis report

Static analysis result for SHA-256 58877121b515d423…

MALICIOUS

PDF

76.1 KB Created: 2021-09-23 04:24:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 8503c800e45edcda8db8705fd918b675 SHA-1: 683242ec7fe89c9f66dfc095f55a563d25561b76 SHA-256: 58877121b515d4230d419c601ef54b0250cc941751f98d4ad487abc8acf30b41
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://irlanc.ru/uplcv?utm_term=4+iron+loft PDF link annotation
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/sazodizoranukejiludubipab.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322f700471b---58494041624.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/52877635218.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/panajewewixumomenebal.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/42982861256.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/voraxutixa.pdfIn PDF document text
    • https://vietnam-pump.com/userfiles/file/23568995480.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/09/20210911205404.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/27396999622.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/winaxubuwusizelu.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/6721816996.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/58812288661.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/lokabi.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/92110067865.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/43090326660.pdfIn PDF document text
    • https://shreenatharcade.com/userfiles/file/bebedugakatenazaveramuto.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/vobafisapekepa.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d55eb0c46---41438429290.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/53844730269.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/gazonikalikomaneme.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FF 9728 bytes
SHA-256: 34475883ea693c9eb31f32696a85dbec2c4abc6ff91b8d90ed241f745a5626c6
font_01_sfnt_off0000df3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF750 17172 bytes
SHA-256: 1d3dba843c3aa75ab24cb9935391fb74e1ceb3ff2f22674b83353aea14918519

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