Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d956f0ee348cfa…

MALICIOUS

PDF

82.3 KB Created: 2021-09-05 23:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9902d013f5e6eb588bc4828403c9b8ae SHA-1: 884eba39ad20b868c7e64a2ace4fecbc0034d2e4 SHA-256: 03d956f0ee348cfa94149cad1f08234b63159dc81840652ec9409914476f5c6b
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to compromised or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and URL analysis point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://akamercedes.com/images/uploads/files/dogasekitepubiwuwoza.pdf In PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a29eef69---1258476193.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/xubaxavebakotekafal.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/57126963678.pdfIn PDF document text
    • http://netmode.net/app/webroot/uploads/files/19535439683.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/44790521729.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/99383229805.pdfIn PDF document text
    • https://foulardfotografando.it/file/26869139597.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/31962089003.pdfIn PDF document text
    • https://dhesient.com/media/bokalopagogesuviv.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/sizidotisude.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/gurudenuxipuzakitu.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/u8u9h0nr2465r17fq1nofmsd5k/53439698779.pdfIn PDF document text
    • https://noventa.cz/media/files/file/gobotivowikefosoxoluf.pdfIn PDF document text
    • http://ongxoanhdpe.vn/upload/files/78027290627.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ra93che3f2cb0r9crpr10hbo20/xinoxajux.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/zerupumoxodoweradikegimik.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/fagefipeliwijebov.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/6227482385.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/8256c243778f38fb07c4601d0c8eda2a/bolumivupepiluxivopod.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/70776335676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ingersoll+rand+air+compressor+manual+2545PDF 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_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 17496 bytes
SHA-256: 8724c25fe7e45e89066350cd410769a44902cf63750f8ec54fccb1f90aa23fb2
font_01_sfnt_off00010a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 11144 bytes
SHA-256: 408727475526553e8a6bd7806d3d78f642bd7da927ed11b8d0ba3feae54d11e7