Malicious PDF — malware analysis report

Static analysis result for SHA-256 514e5b2945de23fd…

MALICIOUS

PDF

79.2 KB Created: 2021-09-20 03:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2ce0b5aac1f56321fa372019c5db615a SHA-1: 6d09cd432fc3de20893d6d6aa9ae5f0f55258d34 SHA-256: 514e5b2945de23fd04f17ecf4863f1bbad2737359c156a7407bf14fbd1270b0b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The presence of numerous external URIs, many pointing to disposable domains, strongly suggests a phishing or credential harvesting campaign. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chayka-svg.ru/files/39172945745.pdf In PDF document text
    • https://shioturboapi4-xyz.com/contents/files/wulunabi.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/vusesiwifipanerakolojafu.pdfIn PDF document text
    • https://zzwgjx.com/d/files/kamidulujukepenorol.pdfIn PDF document text
    • http://pk.mo/userfiles/file/24732444952.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/27849943170.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/xozupuselupatoxulope.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/60953218559.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/nasit.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/bumakanupivosabagarufalu.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/pifudasaz.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/bibexiredikumogupamigimip.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/96459913831.pdfIn PDF document text
    • http://deltools.com/userfiles/file/29271865542.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/toratow.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///75825828935.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/vavevimazujozupenukat.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/82739948663.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/224968611.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///pidebelatekate.pdfIn PDF document text
    • http://triple-a.co.th/ckfinder/userfiles/files/binevikudominadaw.pdfIn PDF document text
    • https://ever-progress.com/upload/files/ralokazafegawegar.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16147b71082505---pupilasinere.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/82112349035.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/nukegotereligutopebip.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/56586718487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+frequency+range+of+radio+wavesPDF 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_off0000d101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD101 17316 bytes
SHA-256: 67eb4e9d4ae6f84048c7b65271c54bf8aa6ea0a2ef880aac5be0132c00350b99
font_01_sfnt_off0000fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDE 11088 bytes
SHA-256: 92699342b562b84f785ef27ea5b9b10e8c90acf78a097b81c265dbdd4b7492d4
font_02_sfnt_off00011742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1