Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01b6ec2fa1006ad…

MALICIOUS

PDF

80.7 KB Created: 2021-10-15 18:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a59ffb9cdfcfdc179d8698f724267cd3 SHA-1: 18a3be3fac5aab843805224e74041b501ea3d8e8 SHA-256: d01b6ec2fa1006adfb15111506a6628e9efb490e5f8e82578d5b6b23d576b3ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm with numerous URLs, many of which point to compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://www.adom.biz.pl/ckfinder/userfiles/files/60051296667.pdf In PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16159a8c6cf8d9---dalowetuzuvoj.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/pafosabowibotumozava.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/roderesemitevunuze.pdfIn PDF document text
    • http://wefocusdesign.com/upload/files/93462033401.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/49063514566.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/simumudipojusezegeto.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/95297958837.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/eqacq234g7ln0mepabb90vcglqjo2038/13619192711.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/10901257248.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/510109_27559861230.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/a5decd121d0d7fe8651e0047661e13eb/64298944527.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/vigiredo.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/89747087612.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0726af97---35049003902.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/69084003870.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/82f70bfbe239509eaa6cf6b3d7f46b9e/63362502946.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613a6949a233e.pdfIn PDF document text
    • http://edallyshop.com/upload/files/10197815735.pdfIn PDF document text
    • http://weshare.vn/attachment/files/40212376490.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/sanagutogiketorimupagigij.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161395fab18b06---52216064509.pdfIn PDF document text
    • http://15881588.com/ckupload/files/bozojitatawow.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/2I9n2o-U8HI/uplcv?utm_term=difference+between+would+could+and+shouldPDF 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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 10900 bytes
SHA-256: ab1f4879ecb03a0d3a449284c71d15c78fd9ac2e045a322e0ae0ae074633854f
font_02_sfnt_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 17548 bytes
SHA-256: 7c7231c10506d3d2076d74945b77f6c8b8b901d6ab58e63addd5fca892fd869c

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