Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecce6f379da230af…

MALICIOUS

PDF

85.6 KB Created: 2021-09-09 09:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 62f97765af60c7326c9b526c4a58c779 SHA-1: 4f16e55e3adace9ffa0086ae695f1073d9ffa65b SHA-256: ecce6f379da230afdecba1c9a856db6f41c2d534a577f61120ef937201a469e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The document contains a link farm pointing to various PDF files hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution attempt. The primary URL, 'https://nomylo.ru/uplcv?utm_term=clash+royale+mod+apk+unlimited+money+elixir+and+gems+latest+version', indicates a lure related to a game mod, likely to entice users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/uplcv?utm_term=clash+royale+mod+apk+unlimited+money+elixir+and+gems+latest+version PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/25800518131.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/mirirusivabozufilapawad.pdfIn PDF document text
    • http://irinabailey.com/upload/files/zatoxil.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/dawokebujovifogogexa.pdfIn PDF document text
    • http://stagticket.com/fck_upload/file/jatowajefininesuduti.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/zonasu.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73475849085.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/xiluser.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138dd02b687d---9754430277.pdfIn PDF document text
    • http://merwepizza.com/upload/file/gisevunizetekunerixofum.pdfIn PDF document text
    • https://zzwgjx.com/d/files/veralovene.pdfIn PDF document text
    • https://onlinendttraining.net/files/lifekuri.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/51640780495.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/0mldpfk6c9u3u98dqhco8babkn/donobopozegosabisewero.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/88291590270.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/dejipisutibigagatev.pdfIn PDF document text
    • http://domplus.su/userfiles/files/1398444141.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/xusaredipikuxaza.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/31957842384.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/84905843606.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/gebamelekevugivima.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/68627802120.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5a79f81d82e7581ffd1f62e65699f822/mididuk.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/69723084318.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161386efb9d858---rilefoxires.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 17844 bytes
SHA-256: b825c5a81fb1d60540dae925de103d84d1f7e96c12f3a377a1e63b3c6a1db9d3
font_02_sfnt_off00012e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 11344 bytes
SHA-256: 7d0f1a45b0a0f77d5676fbef85a33e5fc5e78f1234c17488c5fb245a80dd2ae1

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