Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e86719892e9e002…

MALICIOUS

PDF

68.4 KB Created: 2021-09-24 03:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee403aa7cf94103a8025b4f712ddc29c SHA-1: de43cc2360a74b086391150107c320605d9e6f94 SHA-256: 8e86719892e9e002313621fe021c00fb67f37c3888df945a6b7f762b9537e9dd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution, containing numerous links to external sites. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=viber+application+android+free+download PDF link annotation
    • http://electric-kernbichler.at/5713421043.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/diwajoxufoletazemu.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/vuvazovufugaxa.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136fd5f11085---vesudaripekatagofip.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/21595585337.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e66b0e076---tenutinolulo.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/xekilojoxijut.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/15080954557.pdfIn PDF document text
    • http://mayingiabao.com/upload/files/28155534863.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/pedaxi.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/ligesuj.pdfIn PDF document text
    • http://rilta.net/userfiles/files/90915731654.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/wukilapiwamopan.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/95992278428.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/difilo.pdfIn PDF document text
    • http://newbiesites.com/userfiles/file/votunudubo.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/36149823718.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/86943709874.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/rubenikekidejem.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/29982264291.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/firidawuwez.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/tuzod.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_off0000b043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB043 14204 bytes
SHA-256: 5033e93ce4255f337e2d01c86f7194c2228583fdc077656d91b123f344be7a50
font_01_sfnt_off0000d364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 10640 bytes
SHA-256: 4b8b1cb395c938537da4c6f6798c7de7b37a602b8eea1257a2141e38a19c40fe

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