Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09fb7425e82775d…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 13:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6866fee7dd2f1dadefa3135adf4e35f4 SHA-1: a44b73804b7cb3dab5b58b9eeffac1e04da0cad9 SHA-256: c09fb7425e82775d91d3f74d14274c1b4bc5f3df16dc2cfc9a7bc0efb437f237
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

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=tempest+pirate+rpg+apk PDF link annotation
    • http://alnadaoil.com/userfiles/file/24647295463.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/39090643330.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/wujaru.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/xejojifigupalasum.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/werapejimibifobesufepal.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/teniwifalutovebito.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/39979126553.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/46955837496.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/43313362069.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/matonimudibepanixubo.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/xapadiluxegalikofuwalizu.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/28662998645.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/tovolep.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/zizujajibolefosokezalezu.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/pabanizefojizexogetadofu.pdfIn PDF document text
    • http://asustainable.com/global/file/55951647582.pdfIn PDF document text
    • http://pedraferro.com/files/files/jifodijuliwuxab.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/sosoxitod.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/6252750704.pdfIn PDF document text
    • https://okazionche.com/files/54995670402.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/90165272558.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7248a2b1b---92335876151.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/titobapewawosixipo.pdfIn PDF document text
    • http://cannamelis.com/userfiles/file/jikerapivebaj.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/malizepujedamotizozewi.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/tebanekinuwir.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FD 10380 bytes
SHA-256: 5a04f4b5060a50e522be61c5cb97114f38188fef6cbd2c71b64d80f1786fef79
font_01_sfnt_off0000ca81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA81 18068 bytes
SHA-256: 77db2834d37a1459f0936dd6d67334d233008d5f716af98798947c18a8a06177
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 1944 bytes
SHA-256: 134db95daf3215438f5cd724c3001a970bc92d7c6d770d0881782b55d8c51d9f
font_03_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 16232 bytes
SHA-256: 01cd0e4798e93fb086042d610f43ddeed7bf091af48aa863f5c4a4f61b651684