Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece6b4789d8f64d6…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 11:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b5d4be61f99ab4b9172d5f354b8063c SHA-1: 6589ebecd2395625209e4a979a0918426d9380ac SHA-256: ece6b4789d8f64d6ad923eb963fc103d0e6c8fce1ca79d821192f9e8ff5d09e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term' parameters in some URLs suggests tracking or redirection for malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://archism.ru/uplcv?utm_term=transfer+my+pictures+to+my+new+phone PDF link annotation
    • http://criminisiepartners.it/userfiles/files/pezopaworilegisuzogexenor.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/410ef4f63d10a37420ad7283b69d0107/69469370243.pdfIn PDF document text
    • http://fteq.ru/files/file/82589728755.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/dosera.pdfIn PDF document text
    • https://orangerun.re/photo/files/50163218687.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/duduzufapawakedoxis.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/vojumidowepadelamalu.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/53003603838.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/sizifu.pdfIn PDF document text
    • http://xsteelstock.com/d/files/65980565438.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/24981461441.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/mezajivilixonew.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e29659e18c35fe2eca4ac3397f5e5a60/84734836745.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/5715810055.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/8689713367.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/zijebewudura.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/42013417944.pdfIn PDF document text
    • http://ropesadventure.com/d/files/pitopepujubejebipazove.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/2755360423.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/zikawuxuzafozav.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/vozodilokilowifukibiwini.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/88937309715.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/61328464792.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/sugafa.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/mebubumek.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_off0000df02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF714 19456 bytes
SHA-256: 61511ee9654d375fc52ee5e32a3b453329acfcc6fbaf1f847bcce216c0437d9c
font_02_sfnt_off000129b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B1 10960 bytes
SHA-256: a0cf6541e4d0e05dc3841dff9eb88ae2d36c3f52445340abd4710be88e962ed0