Malicious PDF — malware analysis report

Static analysis result for SHA-256 730b042e391f8407…

MALICIOUS

PDF

87.6 KB Created: 2021-07-30 00:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d787003581ea737f58f14a874f2da12 SHA-1: 8bea68394cbaa2ec7589c35c5969c5ac56adc7e8 SHA-256: 730b042e391f8407dd64d504f5f10672070fbf050a0969e0146e4343de294860
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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://philabc.ru/uplcv?utm_term=pirates+of+the+caribbean+full+movie+in+telugu+dubbed+watch+online PDF link annotation
    • http://jkbprivateiti.com/userfiles/file/jabosewesogewip.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/20367338206.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/c4446d8afe6e2ad95cc8a4c69c1fd9dd/94557514328.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/407c611272d0d75ce9c7436e99fecf8a/zirazotupob.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/40505491599.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/89276610369.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///83269383088.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc939e5593---61775153735.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/62925212873.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa42a2c73a---tagolujiwexizuforef.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/45536110956.pdfIn PDF document text
    • http://grandviewheightsalumni.com/clients/79364/File/dodiregebudazatetopipoxum.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/54517600337.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/cea5261cf20d096d6ba5d47106440a26/zalaf.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/vosux.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cc871165dba1cb6f9d847f629e43c89/62479560444.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ad259d894---41170633593.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/tabepat.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/75864985022.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9d2cb35e6---45389316773.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/38792555864.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/vopisadiz.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/suxixuli.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afe55cb99cb---wisuromofuleti.pdfIn PDF document text
    • http://etnorom.hu/pictures/38415981617.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/943ec255f352a14de576598f29c71e6a/96961039410.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_off0000ef2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2D 17416 bytes
SHA-256: a74938cba29fab1c7df59e2484121f08779b48e796054489075d7c2c59c75c2e
font_01_sfnt_off00011cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C9 11316 bytes
SHA-256: c364374a3deee81ce734c9b315903611eecd235855abcbf6e908ab657cbdbb29