Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d36a1a479dd69a…

MALICIOUS

PDF

85.8 KB Created: 2021-09-07 19:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9da9cb607eec56e723f1d6b152885423 SHA-1: afae6adb43c6454852e4c963df281e8767bf4fd0 SHA-256: 01d36a1a479dd69a3213b9de5a2ad5d86bda73051c34be20fc7b075388329279
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript, though not fully detailed here, is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • 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.
  • 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://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e609b88f9d0bdf2c08583fa6a1ed3181/64000158927.pdf In PDF document text
    • https://alajuusa.eemedia/contents/file/96089097869.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ft1096p4pbms21pnap1koe28ho/fiwamidonepuwiwulubote.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab6b5a0408---zotoson.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/bcefd22e7bcef1ee291bcbf999f702d0/fakan.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/62195977992.pdfIn PDF document text
    • http://fitviewer.de/files/file/58281309117.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/xagesejokizef.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/xanazaxo.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/3f053473eb648434f442c5c4c095c8f3/18862520301.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/tunojumiwagaxadefipu.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/narizubisolevowedopixop.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b382a95cb---sajisokofizujapuregajufun.pdfIn PDF document text
    • http://hidra.it/ckfinder/userfiles/files/sozejisaxeru.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/ff3c8a9966572a8a344512c256a340b7/85441235484.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/72921092241.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871652c5871---ludesaletixaban.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/zararis.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/mabarixaziw.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/xejuxamesok.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/97670301581.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2c8213d3a---14395993834.pdfIn PDF document text
    • http://webursitet.org/Files/file/26410783450.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/6q6kscqlo6a1me6d57eila5440/jipigaborojezobiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=pradhan+mantri+awas+yojana+gramin+form+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC931 16232 bytes
SHA-256: e06ebeaa2bb94d9bf14337b0794fec2c9c4a66e30291689b6f6234bfe360c8a5
font_01_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 11096 bytes
SHA-256: 5bbb37acb9b06b5281c92a4eacb09f892a75fba9ff8e6c7db6672b84eadfb751
font_03_sfnt_off000110a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A2 22260 bytes
SHA-256: add1c4b8c5f2951b87bb8e7d4805f9acf77f7b8bf0ac1464141d29d08c19254d

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