Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f7427065c2d95c…

MALICIOUS

PDF

82.9 KB Created: 2021-09-20 15:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 49b71b0f69b00893f720b44db74ae403 SHA-1: e19bbe08816ec8b67cedb1e31ac77c25484e3c5e SHA-256: 06f7427065c2d95c774acd50dfb5fbea24b00587550c198c1b22cb396abab7a8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://macroedunet.com/userfiles/file/81517883555.pdf In PDF document text
    • http://trunglam.vn/uploads/userfiles/file/wuwidutekugoxesudulo.pdfIn PDF document text
    • http://mayjack.com/upload/files/38383082702.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/muwolijozule.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459ba1d132e---sigukobisaxinirotufunot.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/84404566565.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/42624314570.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/meroxakoniwem.pdfIn PDF document text
    • https://phucatgarment.com.vn/ckfinder/userfiles/files/31709148660.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/40240971604.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/filolisobow.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/23943009527.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/telejog.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/nubabimajujuzimodel.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/32069719323.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/nurewu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b50aad7aae---87517286623.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/petuwofimek.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/89581659113.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/84085074381.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/nofutadobupagezadal.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/gabapopekavilowawopikowe.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/supujevivazi.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/jolirig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=android+9+pc+isoPDF 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_off0000e0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 17872 bytes
SHA-256: c56211c29fe684e9264bca48a22b8619a223863d2f1508df561e485c6f3a7a05
font_02_sfnt_off0001271e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271E 10220 bytes
SHA-256: 484704d22b2f838e472371d9de65ef3600d320553de18240bc83495ac2abe71d