Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3dd291f78a5607…

MALICIOUS

PDF

87.4 KB Created: 2021-09-10 17:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 39ca55eb0b94e52504d5f0b8bd1cd63d SHA-1: 4d6cde4f6535f017b351fdaaa2d733ebddb85b12 SHA-256: ce3dd291f78a5607ca2887cde6f8e494c189e24d621e1d714c9a9542199beed0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xn--z92bzy85x.com/userData/board/file/59305425344.pdf In PDF document text
    • http://alatasfilms.gr/ILC/img/file/fawarexexugodilit.pdfIn PDF document text
    • https://bataretak.com/img/files/file/desizajapemabufezeje.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391f0875d31---sodoretonuxeduvilumusaz.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/fasitulukagurebeluno.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///52159083481.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021091003214797817.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/99283479539.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/bavefesumodawiwarot.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/boxapuvakatibobosujixe.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zafavifererorenifinisote.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/rinitekevuvi.pdfIn PDF document text
    • http://smogy.ru/files/files/50140869751.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/boragoderema.pdfIn PDF document text
    • http://hueide.com/upload/files/58456749269.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5e163a079c381f7feaf7be42edd05acf/gagexapukudilomarujutobi.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/nuxared.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/vokuduxefotabo.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/27412760843.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/wewadujeranusivunadag.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/42006918392.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/zuketepotage.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/1466910835.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/nexafeviwamukogetonuxome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=watch+a+quiet+place+part+2+123moviesPDF 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_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 11184 bytes
SHA-256: 5e5afdc24d262f138facd1ac8a6fe12a1d194cee3a5eadca2055bbff7bab2f2f
font_01_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 19608 bytes
SHA-256: 076008bb965a699dfaf3e565ca35a4a219b3e30a3035fb9015cc627cae11d378
font_02_sfnt_off0001384c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1