Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ed86499888ec91…

MALICIOUS

PDF

81.6 KB Created: 2021-09-01 02:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dbf03cc8da94b2d754e2418b923b9a9c SHA-1: 1e9ab8abf037fa32e48f60a196a580bdde8739b3 SHA-256: 08ed86499888ec91dde4434f045d3159c3a9d907d5d0e870d0a257a941e4238b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple links on potentially compromised CMS upload storage suggests an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://dangkykinhdoanhkiengiang.com/upload/ck/files/momaxadukupubabuzulizako.pdf In PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1f11ef511e5f18951446988da5d87e87/nudapozorijude.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609452fb4b392---40601581550.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/kakun.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/160a6df84d0e50971c6454dd779d5586/75263058548.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/97321318731.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/movema.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/87279918559.pdfIn PDF document text
    • http://sparkpro.lv/content/file/tijuwudo.pdfIn PDF document text
    • http://protectakoteasia.com/ckfinder/userfiles/files/26381027432.pdfIn PDF document text
    • http://klinikoral.com/img/userfiles/files/buketatuzibazibigufim.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/d0ae09fd1b0d3b570c462234be9bfd05/mefedowagakoni.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/78670374423.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/87711771129.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/50577562525.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b035647b9a---dimumupopiva.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4d23554bddc54124afd55c4ec0fb1ca2/buluzevibog.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/dizafapowerowokiva.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/zifusudobetubusekob.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/50917110442.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acead9ebaa3---telodam.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f393adf8a---41239190406.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/bugitime.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e986a61b39a---29958637597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=rdr2+all+fossil+locationsPDF 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_off0000daa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA3 17448 bytes
SHA-256: 71e09a4dd3b36e7898cd8edc012fe9a5601831d5e6dd9d43b22be3cf93e58b70
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 10500 bytes
SHA-256: 7ec922754bb213836f9c9aed20ea639ad35ad607037f5323dcebb0dccbbe35fb
font_02_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1