Malicious PDF — malware analysis report

Static analysis result for SHA-256 def8f8d6191db651…

MALICIOUS

PDF

85.9 KB Created: 2021-09-17 01:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 38bb3416ea04277ea2ea010a5060aefc SHA-1: dcc18d3fa57549f829ceb967181083c3d2d8eb57 SHA-256: def8f8d6191db651ca6443f80095bc0c0802f24e230ae7f89d2f21ad1e083f83
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects to external URLs, such as the identified 'garglob.ru' domain, which is characteristic of phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://garglob.ru/uplcv?utm_term=vita+android+apps PDF link annotation
    • http://airsoft1.ro/files/file/vuvidivofata.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/42319732206.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/tokafiwinerux.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/19052741447.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/23088936388.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/divifegokitosuseri.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/59719406516.pdfIn PDF document text
    • http://chinalabware.ru/d/files/vozefanolixiloxu.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/85618001332.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/puwalogesukudugedo.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090214043973499.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/muponujovigigeloke.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/89756574551.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/zazuwadajixozesapemob.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/rarowizuduradazed.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/piwapibud.pdfIn PDF document text
    • https://interconformity.ro/images/file/62547669668.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/denojaril.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/pofoleju.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/refodi.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/69967961858.pdfIn PDF document text
    • https://samowar.me/upload/file/mifodulijasivebijoxumopa.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/kiviteladonezu.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c09766907f---41052836370.pdfIn PDF document text
    • https://xn--bankkrtya-41a.hu/js/ckfinder/userfiles/files/sajedimetano.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb89301d33---bijil.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_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 10176 bytes
SHA-256: 76bb295157c17d1ae7ad481316f80a07e24631090689e530fd94dc3b97a09001
font_01_sfnt_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3C 18056 bytes
SHA-256: ca3fd370f6d2c5f14411ff90db58b2aea5cb05dbd9ff5f9425cf2137a1ab50fa