Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afad80122320894…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 02:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 14aeacb5cbe0d26e937456eea44d48e4 SHA-1: 81c0205199280b7a1455a1091543ca627b2ad4b6 SHA-256: 5afad80122320894f68989cd466b81202c91d8e9aa52dbe28f8c7177762b62dd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of numerous distinct hosts and URLs indicates a broad distribution effort.

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://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae04ba74636---23955499870.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ce5911762b7ed46a98ff02d510c7188d/57468535735.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210618080825.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/fupigusaluxawa.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/791523143.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/sikumutiwezexebapetij.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/64267ca8c977005046c39955e4361570/koxudav.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/welofugolufanumav.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/belifu.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a0205bb8e4f---zobuzipeziparolewiwaz.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c3375e1528b---texox.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/63183603345.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/xopiganit.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749972d0b46---54149019649.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/gokogituxiwifed.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/27353864950.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf2a8d7a89---tazirokixekosudabeb.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/73422184825.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e4dfc22032f8f5140d473adaae85efed/gaxaresun.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/58971058151.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/6006567747.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089befe88356---ronagibimako.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/21136016824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=year+3+money+worksheets+twinklPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/sorasevexosu.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_off0000cdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 10820 bytes
SHA-256: 8634dcca6720b44c1729e79f92be1bfd2b0946cf59adf309201c64b3f6f89d92
font_02_sfnt_off0000feb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB8 17472 bytes
SHA-256: eeb18bdc79614683c5e47ac0cfbaa26edd97f32ff1088782b865e567ffd0fb64