Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6aedaf7b90e45fd…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 17:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 565143c11a6e8ad1788a4b15e53b791c SHA-1: 28ec2ee9bfb28e14b8037ce6b5cfa045577f0a64 SHA-256: c6aedaf7b90e45fd2b9d788c82618342962277b685095bb4b59e7455b777f250
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, suggests the document is designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is part of a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=mod+aim+tool+for+8+ball+pool PDF link annotation
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/bukakilorazavetirix.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/jexikexe.pdfIn PDF document text
    • http://maksimetall.ru/files/kakifutafikomuvi.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/10650707263.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/48911354813.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210906153717.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/tugedafovapogovutodarupi.pdfPDF link annotation
    • https://dienmayminhchau.vn/uploads/news_file/98324335629.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/vugegeparezo.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///dobekide.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/p6gplf2djpfhlk7p27a72evhl5/89506949647.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131ab26b174e---goloxufolu.pdfIn PDF document text
    • https://ocw.tw/uploads/files/rovatolozuxegozokoxewaz.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/xazolunalibixopaxosaroj.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/zoxuz.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/29232120296.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/bosovugagol.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/lagesupijugolinusodozen.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/22625506114.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210911155141.pdfIn PDF document text
    • http://tabletopad.com/images/file/jixapuju.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/xozomofobizagoxus.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/7974121358.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210901055400451066.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_off0000d953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 10596 bytes
SHA-256: 64cfeef5b05db84752f6df7388394f42681fda73255f8e8202325b80e208dada
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 16944 bytes
SHA-256: 2fe4608da455c87cc6cabf66b962e258a3d69dda6b39845319a042728e8fbdcd
font_02_sfnt_off00011d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1