Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0264103c94bf9d…

MALICIOUS

PDF

92.0 KB Created: 2021-08-19 00:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1f17431bf9b959533df4c0d3c7261dfc SHA-1: a2eb3c979ca37e3609d539ac0dbd490ca66169c9 SHA-256: 1e0264103c94bf9d67174f59439e30121e9d1eeda509a134c3f873f587ac77af
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://kondicionery-shodnya.ru/upload_picture/file/tivajigesudatil.pdf In PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/a784305136c66da798f8b04d53698ea6/14582150381.pdfIn PDF document text
    • https://iword.de/userfiles/file/xefijurixuzipuseroratoj.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83c3654647---laboful.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6f51c76f9---98805069556.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/42125069799.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/grnd46dhics5mid2flibgepje6/zokixixixopoviwawew.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/vobidawedaw.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1904718e---17982056511.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed04855731---jojunijokesof.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/37357688059.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/lefirepuserolo.pdfIn PDF document text
    • https://jetaime-shop.com/files/tufiwugefobiregokim.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac073ee481a---58029631847.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/82915767974.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0bde0f797---gukaxirofitipe.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794aafab3be---85949357788.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/xogokejebowajanazisana.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/midotubikinorijulikemofe.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/24174027477.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/25962108330.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/xifagowodelilikuparefurem.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/23imiatlj93f1k5lk6aup596io/16152012158.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/vedegulofizebevowe.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jixuw.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/3301cd1bf9fd4a105d0fc8026899edc0/74396517826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+reset+a+double+diamond+slot+machinePDF 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_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 10952 bytes
SHA-256: 6157bbe29a51fe4bf2e86f0d377c5dad22c86910655068c2a1c00efdb9df6254
font_01_sfnt_off00011d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13530 16772 bytes
SHA-256: a29b2d797ee253c58b77d315f86e2f4a4517870eccb3baa022a83efaaf1578c9