Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d42f9063467a4d…

MALICIOUS

PDF

86.4 KB Created: 2021-09-18 18:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: acaf8b297547ad68e066ad026b87cbe9 SHA-1: c575fdb649b6fb7da268a609b3f6f711c57fc275 SHA-256: 05d42f9063467a4dca617390c0cdc45de9cda4d3e9b838f58690293620148b74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://cosmopolitanhotel.eu/uploads/wysiwyg/files/zepoxazakajigi.pdf In PDF document text
    • http://rintoyo.com/userfiles/file/zenegesonujezimowubajowan.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/bfb30185288e37a822482fc5f2eb5ba4/16889833937.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/sotadalaxexakot.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/lsu7a3unvadv003nh15l9ro6af/73493352388.pdfIn PDF document text
    • http://nhagiatxanh.com/public/default/ckeditor/files/pomajodebixosazi.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/wozodorotusibidinilegu.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/52035907851.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/tatudeweriz.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/65170936895.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/geniburexi.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/kawetinujovevibobivapora.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/161398ced0547a---pemalerekeberenigexog.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613424e580998---mumovefunebiwubuvuwij.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/bapole.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/68907781852.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/4450343590.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/19952881674.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/vinodemotubukipakekotafad.pdfIn PDF document text
    • https://fuoriscena.eu/file/89014087853.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/taworuwonawuwigiga.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/bikosutuj.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/bujiwis.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/kamebibewirotuvasibi.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/99652318473.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/54665402986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=benefits+of+information+technology+in+businessPDF 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_off0000eb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 11192 bytes
SHA-256: c2e998f41d767179f41be212c9708a6d4b4ef5ab09ec7fb071a1e455a0846257
font_02_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 17972 bytes
SHA-256: 1c6b18ebde0ce83c44299fd464ee5740fe3fd9caef81cc8907705f9860e5c14c