Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eec1e926ed1f445…

MALICIOUS

PDF

78.2 KB Created: 2021-09-02 00:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d0cc03b69e42598b16e6b2afde5e8e1f SHA-1: 14da884ecb4a761d6553a6b0996253c43f9a4959 SHA-256: 9eec1e926ed1f4455a0a5585b00eb06cdd5db0ba755803684a34ec7968c8eccc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting, likely intended to redirect users to malicious content. The document body is heavily obfuscated and contains no readable text, further suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/weveziraragafoxipogumiko.pdf In PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/gpfntn1ga7rqc3ebtv9e3qktt4/19491462149.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085813cce050---95381427721.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/86787358191.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/puzijes.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210831_716FA3E950592A87.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b53e135c8c968b1b1a632289cd41fae1/rigugilepebilawudebab.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/dapapomejavad.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19742999040.pdfIn PDF document text
    • http://devison-matras.com/upload/file/savovor.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8eda8f54---zakapuju.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-20/20210620075606157297.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/xetixuwatarigulomilokovik.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8722e4f253---widawema.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/27443895804.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/10895582765.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/jemotimikavagolupisar.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/628663775203d8936df81f48ed284c1d/fewoxarapokoba.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/rawaxujoz.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/88906145725.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/22776986152.pdfIn PDF document text
    • http://newmob.it/userfiles/files/95438775876.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/70084872640.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bf995a7b2ab---53076865348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=pros+and+cons+of+regenerative+agriculturePDF 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_off0000ccb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB4 10820 bytes
SHA-256: 9975e34ac4df1a8622f61abaa748cef5c53f2143fb453f6737dd8f096f32207c
font_01_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 17728 bytes
SHA-256: 0a0cd13c81709d283792591ec18564376a8def010df5434945bdddce49784136

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