Malicious PDF — malware analysis report

Static analysis result for SHA-256 52572b1933c6209e…

MALICIOUS

PDF

73.0 KB Created: 2021-09-10 19:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 18b2dc85c9a02988a54a42a07e691b3d SHA-1: ad34b9392593ac619e495448ccdcc7dfc4c9780e SHA-256: 52572b1933c6209e32a9c0aa54b9959e09a3a57c0d840a2213eaa59386e3e274
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 0.9973

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 http://uralcomservis.ru/crn_fls/crn_files/69852528202.pdf In PDF document text
    • http://casaledellasignora.it/userfiles/files/vomomifojug.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/2955574321.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/84661330145.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/gunotidorazepopefaf.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613588328093c---36481523190.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/pisukobogan.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/birasawedonopixewa.pdfIn PDF document text
    • https://novsport.com/content/File/vaxafa.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/30152191743.pdfIn PDF document text
    • http://school15-tyumen.ru/f/58724962484.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/dunur.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/diwibutexekuvonutim.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/josexeguvigufikikotatola.pdfIn PDF document text
    • http://kammed.com/userfiles/file/71630759094.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/sukodufenekanizuvupozadem.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/gebiwarotonotigipaw.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/zusivoxabebapevime.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/wamiwedasafowizimezor.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/87455640159.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/kesegekafadifosoduzoludex.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/nukefop.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/48876262788.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/67701727961.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/gepubilonomuniz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=watch+age+of+ultron+online+freePDF 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

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_off0000bc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC25 16436 bytes
SHA-256: ca356623873c0bf9f7155491740aec750d01bc40d1e3a80ae03322229002e8b4
font_01_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 10540 bytes
SHA-256: 187fec9930713ac3bc4086414a48ee725a2fd26aebd1ff46789923882c0efe7f

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