Malicious PDF — malware analysis report

Static analysis result for SHA-256 697ba9ecafaea2fe…

MALICIOUS

PDF

72.9 KB Created: 2021-09-04 07:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 17d5e2ea867b917267422058d2d6f0dd SHA-1: e23f1ef540a679f53b4ee6e99cd7864841d95900 SHA-256: 697ba9ecafaea2fe6ff53462e3c069983c23948d74f146a2a1aaa9851c4c131d
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external sites, many of which appear to be part of a link farm hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing page. The presence of embedded JS and external links suggests an attempt to exploit the user or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 9

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b8953ebca3215971fbdd95e382a5cd8d/mafapomavafabeja.pdf In PDF document text
    • http://vizcsap.hu/files/file/puxujil.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/98488811618.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/fesagurugetowi.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/52451994125.pdfIn PDF document text
    • http://ridendo.cz/files/file/gododamudu.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072863ed80ed---72094883902.pdfIn PDF document text
    • http://majesticcaliberenglishlabradors.com/clients/a/a7/a77fae3751d16767b5fd1969bdae34dd/File/42726605958.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/4ff8327308466cb395e6301d9f7c4f38/wuvomaduzafefegupekefaje.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/sikataniforalujik.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/g2qo3ae8etjml6lkslq6oi3dg1/23695412042.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/82837be2a9540207d3a5ac9cfadaaa66/dosixutixujowukufanuj.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7160c7d55---maludodatolorikejibepil.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c13b7be7bd0---jodoguguzegibolejozup.pdfIn PDF document text
    • http://casaperugia.fr/userfiles/file/60542289274.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/14603333389.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/15547646048.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/zaluwebir.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/jatedokosirafesepi.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6b5595387---6433685389.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/litokuvituxibe.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/17709261047.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/xusomutulonevonujinim.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/8e88f46c80aed2f4ada16bd2a5b324a8/44038566238.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bb661bb93d3---24330190934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=gilson+pipetman+manualPDF 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_off0000bab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB3 10452 bytes
SHA-256: 863e082e218482dbdef272c5540ceba054e2324c9a777130ffd6074162e026a3
font_01_sfnt_off0000d26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26D 16856 bytes
SHA-256: 7a707c7c34d4ff02e6af1a4cdcb6b7fd3e3c7be4ebc352c8100332cd666ea36b
font_02_sfnt_off0000fdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.