Malicious PDF — malware analysis report

Static analysis result for SHA-256 47390eeb4a0775a2…

MALICIOUS

PDF

76.4 KB Created: 2021-09-16 18:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73bfb764cf5bcd16f6f0061c9c0cfc31 SHA-1: 94d3ec7f95ec1a55a8d0184d3815f13a3b3b5a5c SHA-256: 47390eeb4a0775a2d78db4f2a2886b8b51cfc53c5c64cfdd24424e9ef3e4f2f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=anakin+skywalker+live+wallpaper PDF link annotation
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/4b704989e5f1717cf08b7b8c7f1e05e3/51567464056.pdfIn PDF document text
    • http://runhouchem.com/upload/files/kenobagarusovovixosuvarew.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/xunasojolifudiwuti.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/jokewomajutixagowopevak.pdfIn PDF document text
    • https://gulamanis.com/contents/files/56843199611.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/68759861270.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/nexarasigagivak.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3a7a8ee08d4158496b0da2935f036710/65068200639.pdfIn PDF document text
    • http://robertwestlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41034968417.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/mvne86u3bc2rt0u84lhjhpgt7j/63389214784.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/nusazurimegogadikefela.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d2fe76436---78180714726.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/vixefabejidelidakare.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/linufojuruxiloguxap.pdfIn PDF document text
    • https://littleitalypizzany.com/nbloom/fckuploads/file/lobijebilosowuvutujimure.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/2500749341.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/negetegopolupozopogij.pdfIn PDF document text
    • http://beta-rc.com/upload/files/mopigamawotozogaxamibire.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/nebapinepuxetob.pdfIn PDF document text
    • http://gaudi.tw/upload/file/tesariselozadatomomux.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_off0000ca85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 16328 bytes
SHA-256: c9b586663eb81253f3c94910b78015784a320d8879479c48b0e82f88a7b952ef
font_01_sfnt_off0000f4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A5 10364 bytes
SHA-256: b4e6f17c0597085ad2eaf00f635d1106248d22728c14269e057af9945659d337
font_02_sfnt_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1